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The coronavirus emerged in only December last year, but already the world is dealing with a pandemic of the virus and the disease it causes - Covid-19.

For most, the disease is mild, but some people die.

So how is the virus attacking the body, why are some people being killed and how is it treated?

Incubation period

This is when the virus is establishing itself.

Viruses work by getting inside the cells your body is made of and then hijacking them.

The coronavirus, officially called Sars-CoV-2, can invade your body when you breathe it in (after someone coughs nearby) or you touch a contaminated surface and then your face.

It first infects the cells lining your throat, airways and lungs and turns them into "coronavirus factories" that spew out huge numbers of new viruses that go on to infect yet more cells.

At this early stage, you will not be sick and some people may never develop symptoms.

The incubation period, the time between infection and first symptoms appearing, varies widely, but is five days on average.

Mild disease

This is all most people will experience.

Covid-19 is a mild infection for eight out of 10 people who get it and the core symptoms are a fever and a cough.

Body aches, sore throat and a headache are all possible, but not guaranteed.

The fever, and generally feeling grotty, is a result of your immune system responding to the infection. It has recognised the virus as a hostile invader and signals to the rest of the body something is wrong by releasing chemicals called cytokines.

These rally the immune system, but also cause the body aches, pain and fever.

The coronavirus cough is initially a dry one (you're not bringing stuff up) and this is probably down to irritation of cells as they become infected by the virus.

Some people will eventually start coughing up sputum - a thick mucus containing dead lung cells killed by the virus.

These symptoms are treated with bed rest, plenty of fluids and paracetamol. You won't need specialist hospital care.

This stage lasts about a week - at which point most recover because their immune system has fought off the virus.

However, some will develop a more serious form of Covid-19.

This is the best we understand at the moment about this stage, however, there are studies emerging that suggest the disease can cause more cold-like symptoms such as a runny nose too.

• EASY STEPS: How to keep safe
• A SIMPLE GUIDE: What are the symptoms?
• WHO'S AT RISK: Are women and children less affected?
• CONTAINMENT: What it means to self-isolate
• MAPS AND CHARTS: Visual guide to the outbreak
• VIDEO: The 20-second hand wash

Severe disease

If the disease progresses it will be due to the immune system overreacting to the virus.

Those chemical signals to the rest of the body cause inflammation, but this needs to be delicately balanced. Too much inflammation can cause collateral damage throughout the body.

"The virus is triggering an imbalance in the immune response, there's too much inflammation, how it is doing this we don't know," said Dr Nathalie MacDermott, from King's College London.

Inflammation of the lungs is called pneumonia.

If it was possible to travel through your mouth down the windpipe and through the tiny tubes in your lungs, you'd eventually end up in tiny little air sacs.

This is where oxygen moves into the blood and carbon dioxide moves out, but in pneumonia the tiny sacs start to fill with water and can eventually cause shortness of breath and difficulty breathing.

Some people will need a ventilator to help them breathe.

This stage is thought to affect around 14% of people, based on data from China.

Critical disease

It is estimated around 6% of cases become critically ill.

By this point the body is starting to fail and there is a real chance of death.

The problem is the immune system is now spiralling out of control and causing damage throughout the body.

It can lead to septic shock when the blood pressure drops to dangerously low levels and organs stop working properly or fail completely.

Acute respiratory distress syndrome caused by widespread inflammation in the lungs stops the body getting enough oxygen it needs to survive. It can stop the kidneys from cleaning the blood and damage the lining of your intestines.

"The virus sets up such a huge degree of inflammation that you succumb. it becomes multi-organ failure," Dr Bharat Pankhania said.

And if the immune system cannot get on top of the virus, then it will eventually spread to every corner of the body where it can cause even more damage.

Treatment by this stage will be highly invasive and can include ECMO or extra-corporeal membrane oxygenation.

This is essentially an artificial lung that takes blood out of the body through thick tubes, oxygenates it and pumps it back in.

But eventually the damage can reach fatal levels at which organs can no longer keep the body alive.

The first deaths

Doctors have described how some patients died despite their best efforts.

The first two patients to die at Jinyintan Hospital in Wuhan, China, detailed in the Lancet Medical journal, were seemingly healthy, although they were long-term smokers and that would have weakened their lungs.

The first, a 61-year-old man, had severe pneumonia by the time he arrived at hospital.

He was in acute respiratory distress, and despite being put on a ventilator, his lungs failed and his heart stopped beating.

He died 11 days after he was admitted.

The second patient, a 69-year-old man, also had acute respiratory distress syndrome.

He was attached to an ECMO machine but this wasn't enough. He died of severe pneumonia and septic shock when his blood pressure collapsed.

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Coronaviruses are a large family of viruses which may cause illness in animals or humans. In humans, several coronaviruses are known to cause respiratory infections ranging from the common cold to more severe diseases such as Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS). The most recently discovered coronavirus causes coronavirus disease COVID-19.

COVID-19 is the infectious disease caused by the most recently discovered coronavirus. This new virus and disease were unknown before the outbreak began in Wuhan, China, in December 2019. COVID-19 is now a pandemic affecting many countries globally.

The most common symptoms of COVID-19 are fever, dry cough, and tiredness. Some patients may have aches and pains, nasal congestion, sore throat or diarrhea. These symptoms are usually mild and begin gradually. Some people become infected but only have very mild symptoms. Most people (about 80%) recover from the disease without needing hospital treatment. Around 1 out of every 5 people who gets COVID-19 becomes seriously ill and develops difficulty breathing. Older people, and those with underlying medical problems like high blood pressure, heart and lung problems, diabetes, or cancer , are at higher risk of developing serious illness. However anyone can catch COVID-19 and become seriously ill. Even people with very mild symptoms of COVID-19 can transmit the virus. People of all ages who experience fever, cough and difficulty breathing should seek medical attention.

If you have minor symptoms, such as a slight cough or a mild fever, there is generally no need to seek medical care. Stay at home, self-isolate and monitor your symptoms. Follow national guidance on self-isolation.

However, if you live in an area with malaria or dengue fever it is important that you do not ignore symptoms of fever. Seek medical help. When you attend the health facility wear a mask if possible, keep at least 1 metre distance from other people and do not touch surfaces with your hands. If it is a child who is sick help the child stick to this advice.

Seek immediate medical care if you have difficulty breathing or pain/pressure in the chest. If possible, call your health care provider in advance, so he/she can direct you to the right health facility.

People can catch COVID-19 from others who have the virus. The disease spreads primarily from person to person through small droplets from the nose or mouth, which are expelled when a person with COVID-19 coughs, sneezes, or speaks. These droplets are relatively heavy, do not travel far and quickly sink to the ground. People can catch COVID-19 if they breathe in these droplets from a person infected with the virus. This is why it is important to stay at least 1 metre (3 feet) away from others. These droplets can land on objects and surfaces around the person such as tables, doorknobs and handrails. People can become infected by touching these objects or surfaces, then touching their eyes, nose or mouth. This is why it is important to wash your hands regularly with soap and water or clean with alcohol-based hand rub.

WHO is assessing ongoing research on the ways that COVID-19 is spread and will continue to share updated findings.

COVID-19 is mainly spread through respiratory droplets expelled by someone who is coughing or has other symptoms such as fever or tiredness. Many people with COVID-19 experience only mild symptoms. This is particularly true in the early stages of the disease. It is possible to catch COVID-19 from someone who has just a mild cough and does not feel ill.

Some reports have indicated that people with no symptoms can transmit the virus. It is not yet known how often it happens. WHO is assessing ongoing research on the topic and will continue to share updated findings.

Practicing hand and respiratory hygiene is important at ALL times and is the best way to protect others and yourself.

When possible maintain at least a 1 metre (3 feet) distance between yourself and others. This is especially important if you are standing by someone who is coughing or sneezing. Since some infected persons may not yet be exhibiting symptoms or their symptoms may be mild, maintaining a physical distance with everyone is a good idea if you are in an area where COVID-19 is circulating.

If you have been in close contact with someone with COVID-19, you may be infected.

Close contact means that you live with or have been in settings of less than 1 metre from those who have the disease. In these cases, it is best to stay at home.

However, if you live in an area with malaria or dengue fever it is important that you do not ignore symptoms of fever. Seek medical help. When you attend the health facility wear a mask if possible, keep at least 1 metre distant from other people and do not touch surfaces with your hands. If it is a child who is sick help the child stick to this advice.

If you do not live in an area with malaria or dengue fever please do the following:

• If you become ill, even with very mild symptoms you must self-isolate
• Even if you don’t think you have been exposed to COVID-19 but develop symptoms, then self-isolate and monitor yourself
• You are more likely to infect others in the early stages of the disease when you just have mild symptoms, therefore early self-isolation is very important.
• If you do not have symptoms, but have been exposed to an infected person, self-quarantine for 14 days.

If you have definitely had COVID-19 (confirmed by a test) self-isolate for 14 days even after symptoms have disappeared as a precautionary measure – it is not yet known exactly how long people remain infectious after they have recovered. Follow national advice on self-isolation.

Self-isolation is an important measure taken by those who have COVID-19 symptoms to avoid infecting others in the community, including family members.

Self-isolation is when a person who is experiencing fever, cough or other COVID-19 symptoms stays at home and does not go to work, school or public places. This can be voluntarily or based on his/her health care provider’s recommendation. However, if you live in an area with malaria or dengue fever it is important that you do not ignore symptoms of fever. Seek medical help. When you attend the health facility wear a mask if possible, keep at least 1 metre distant from other people and do not touch surfaces with your hands. If it is a child who is sick help the child stick to this advice.

If you do not live in an area with malaria or dengue fever please do the following:

- If a person is in self-isolation, it is because he/she is ill but not severely ill (requiring medical attention)

• have a large, well-ventilated with hand-hygiene and toilet facilities
• If this is not possible, place beds at least 1 metre apart
• Keep at least 1 metre (3 feet) from others, even from your family members
• Monitor your symptoms daily
• Isolate for 14 days, even if you feel healthy
• If you develop difficulty breathing, contact your healthcare provider immediately – call them first if possible
• Stay positive and energized by keeping in touch with loved ones by phone or online, and by exercising yourself at home.

To self-quarantine means to separate yourself from others because you have been exposed to someone with COVID-19 even though you, yourself, do not have symptoms. During self-quarantine you monitor yourself for symptoms. The goal of the self-quarantine is to prevent transmission. Since people who become ill with COVID-19 can infect people immediately self-quarantine can prevent some infections from happening. .

• Have a large, well-ventilated single room with hand hygiene and toilet facilities
• If this is not available place beds at least 1 metre apart.
• Keep at least 1-metre distance from others, even from your family members.
• Monitor your symptoms daily
• Self-quarantine for 14 days, even if you feel healthy
• If you develop difficulty breathing, contact your healthcare provider immediately – call them first if possible.
• Stay positive and energized by keeping in touch with loved ones by phone or online, and by exercising yourself at home.

However, if you live in an area with malaria or dengue fever it is important that you do not ignore symptoms of fever. Seek medical help. When you attend the health facility wear a mask if possible, keep at least 1 metre distant from other people and do not touch surfaces with your hands. If it is a child who is sick help the child stick to this advice.

Quarantine means restricting activities or separating people who are not ill themselves but may have been exposed to COVID-19. The goal is to prevent spread of the disease at the time when people just develop symptoms.

Isolation means separating people who are ill with symptoms of COVID-19 and may be infectious to prevent the spread of the disease.

Physical distancing means being physically apart. WHO recommends keeping at least 1-metre (3 feet) distance from others. This is a general measure that everyone should take even if they are well with no known exposure to COVID-19.

Research indicates that children and adolescents are just as likely to become infected as any other age group and can spread the disease.

Evidence to date suggests that children and young adults are less likely to get severe disease, but severe cases can still happen in these age groups.

Children and adults should follow the same guidance on self-quarantine and self-isolation if there is a risk they have been exposed or are showing symptoms. It is particularly important that children avoid contact with older people and others who are at risk of more severe disease.

Stay aware of the latest information on the COVID-19 outbreak, available on the WHO website and through your national and local public health authority. Most countries around the world have seen cases of COVID-19 and many are experiencing outbreaks. Authorities in China and some other countries have succeeded in slowing their outbreaks. However, the situation is unpredictable so check regularly for the latest news.

You can reduce your chances of being infected or spreading COVID-19 by taking some simple precautions:

• Regularly and thoroughly clean your hands with an alcohol-based hand rub or wash them with soap and water. Why? Washing your hands with soap and water or using alcohol-based hand rub kills viruses that may be on your hands.
• Maintain at least 1 metre (3 feet) distance between yourself and others. Why? When someone coughs, sneezes, or speaks they spray small liquid droplets from their nose or mouth which may contain virus. If you are too close, you can breathe in the droplets, including the COVID-19 virus if the person has the disease.
• Avoid going to crowded places. Why? Where people come together in crowds, you are more likely to come into close contact with someone that has COIVD-19 and it is more difficult to maintain physical distance of 1 metre (3 feet).
• Avoid touching eyes, nose and mouth. Why? Hands touch many surfaces and can pick up viruses. Once contaminated, hands can transfer the virus to your eyes, nose or mouth. From there, the virus can enter your body and infect you.
• Make sure you, and the people around you, follow good respiratory hygiene. This means covering your mouth and nose with your bent elbow or tissue when you cough or sneeze. Then dispose of the used tissue immediately and wash your hands. Why? Droplets spread virus. By following good respiratory hygiene, you protect the people around you from viruses such as cold, flu and COVID-19.
• Stay home and self-isolate even with minor symptoms such as cough, headache, mild fever, until you recover. Have someone bring you supplies. If you need to leave your house, wear a mask to avoid infecting others. Why? Avoiding contact with others will protect them from possible COVID-19 and other viruses.
• If you have a fever, cough and difficulty breathing, seek medical attention, but call by telephone in advance if possible and follow the directions of your local health authority. Why? National and local authorities will have the most up to date information on the situation in your area. Calling in advance will allow your health care provider to quickly direct you to the right health facility. This will also protect you and help prevent spread of viruses and other infections.
• Keep up to date on the latest information from trusted sources, such as WHO or your local and national health authorities. Why? Local and national authorities are best placed to advise on what people in your area should be doing to protect themselves.

Not yet. To date, there is no vaccine and no specific antiviral medicines against COVID-19. However, .people, particularly those with serious illness, may need to be hospitalized so that they can receive life-saving treatment for complications.. Most patients recover thanks to such care.

Possible vaccines and some specific drug treatments are currently under investigation. They are being tested through clinical trials. WHO is coordinating efforts to develop vaccines and medicines to prevent and treat COVID-19.

The most effective ways to protect yourself and others against COVID-19 are to:

• Clean your hands frequently and thoroughly
• Avoid touching your eyes, mouth and nose
• Cover your cough with the bend of elbow or tissue. If a tissue is used, discard it immediately and wash your hands.
• Maintain a distance of at least 1 metre (3 feet) from others.

The time between exposure to COVID-19 and the moment when symptoms start is commonly around five to six days but can range from 1 – 14 days.

COVID-19 is spread through human-to-human transmission.

We already know a lot about other viruses in the coronavirus family and most of these types of viruses have an origin in animals. The COVID-19 virus (also called SARS-CoV-2) is a new virus in humans. The possible animal source of COVID-19 has not yet been confirmed but research is ongoing.

WHO continues to monitor the latest research on this and other COVID-19 topics and will update, as new findings are available.

Several dogs and cats (domestic cats and a tiger) in contact with infected humans have tested positive for COVID-19. In addition, ferrets appear to be susceptible to the infection. In experimental conditions, both cats and ferrets were able to transmit infection to other animals of the same species, but there is no evidence that these animals can transmit the disease to human and play a role in spreading COVID-19. COVID-19 is mainly spread through droplets produced when an infected person coughs, sneezes, or speaks.

It is still recommended that people who are sick with COVID-19 and people who are at risk limit contact with companion and other animals. When handling and caring for animals, basic hygiene measures should always be implemented. This includes hand washing after handling animals, their food, or supplies, as well as avoiding kissing, licking or sharing food.

WHO continues to monitor the latest research on this and other COVID-19 topics and will update as new findings are available

The most important thing to know about coronavirus on surfaces is that they can easily be cleaned with common household disinfectants that will kill the virus. Studies have shown that the COVID-19 virus can survive for up to 72 hours on plastic and stainless steel, less than 4 hours on copper and less than 24 hours on cardboard.

As, always clean your hands with an alcohol-based hand rub or wash them with soap and water. Avoid touching your eyes, mouth, or nose.

When grocery shopping, keep at least 1-metre distance from others and avoid touching your eyes, mouth and nose. If possible, sanitize the handles of shopping trolleys or baskets before shopping. Once home, wash your hands thoroughly and also after handling and storing your purchased products.

There is currently no confirmed case of COVID-19 transmitted through food or food packaging.

Fruits and vegetables are important components of a healthy diet. Wash them the same way you should do under any circumstance: before handling them, wash your hands with soap and water. Then, wash fruits and vegetables thoroughly with clean water, especially if you eat them raw.

No. Antibiotics do not work against viruses; they only work on bacterial infections. COVID-19 is caused by a virus, so antibiotics do not work. Antibiotics should not be used as a means of prevention or treatment of COVID-19. In hospitals physicians will sometimes use antibiotics to prevent or treat secondary bacterial infections which can be a complication of COVID-19 in severely ill patients. They should only be used as directed by a physician to treat a bacterial infection.

While initial investigations suggest the virus may be present in faeces in some cases, to date, there have not been reports of faecal-oral transmission of COVID-19. Additionally, there is no evidence to date on the survival of the COVID-19 virus in water or sewage.

WHO is assessing ongoing research on the ways COVID-19 is spread and will continue to share new findings on this topic.

When people ask how to protect themselves against the spread of COVID-19, one of the first suggestions from doctors is washing your hands. Here are the do's and don'ts. USA TODAY

As the coronavirus pandemic spreads around the world, hundreds of our readers across the nation have asked us questions about COVID-19.

To answer many of your concerns – What are the symptoms? How should you prepare? How is it spread? – we've put together an explainer on the virus. We've also debunked some of those viral coronavirus myths you're seeing on social media. (No, it's not related to Corona beer. And no, it didn't escape from a Chinese lab.)

But you're curious, so we wanted to address more of the important questions you submitted via our newsletter, Coronavirus Watch. (Not a newsletter subscriber? Sign up for it here!)

What else would you like to know? Ask us by filling out the form here.

(Update: Your questions keep on rolling in, so we're continuing to find you answers. Check out our latest reader Q&A here.)

If a person tests positive for influenza, they are not tested for coronavirus. Could a person have both?

– Diana from Goodyear, Arizona

Yes, a person could have both. This was the case for one patient in China, according to the U.S. Centers for Disease Control and Prevention. The 69-year-old man in Wuhan had both SARS-CoV-2 and influenza A virus. Doctors initially diagnosed the man with the flu and later diagnosed the coronavirus.

Doctors studying the patient said the case "suggests that COVID-19 might be underdiagnosed because of false-negative tests for upper respiratory specimens or co-infection with other respiratory viruses. Broader viral testing might be needed."

Peter Hotez, dean of the National School of Tropical Medicine at Baylor College of Medicine, agrees.

"I don’t like that people are doing flu tests and saying therefore it’s not coronavirus," Hotez said. "Traditionally, for flu, we know it’s possible to get other co-infectious with other viruses."

Can testing show if someone has had coronavirus and then recovered?

– Chris from Pasadena, California

Yes, but it depends on what kind of test you do. "If you do an antibody test, in theory it could show that you had the virus and then recovered," Hotez said.

To do an antibody test, you'd need to have blood drawn. But coronavirus tests in the U.S. aren't being done this way.

Will mosquitos be able to catch this virus and pass it on to humans this summer?

– Jodie from Texas

No, Hotez says. As far as we know, it's not a mosquito-transmitted virus.

Is it best to cancel routine doctor and dental appointments?

– Cathy from Kingston, New York

Federal health officials are asking Americans to stay home as much as possible and cancel any elective surgeries. Some local and state governments have implemented stricter rules.

If it's possible to keep your appointment and speak with your provider over the phone or video, you should. However, if you cannot speak with a provider remotely and are able to reschedule your in-person appointment for a later date, you should.

What is involved in testing for the coronavirus? Is it the same as when they do a nasal swab for influenza?

– Julie from Chicago, Illinois

To collect a sample for a diagnostic test for SARS-CoV-2, the virus that causes the COVID-19 disease, doctors typically use the same method of collection as they would for influenza: a nasopharyngeal swab. For this swab, a tiny Q-tip on plastic or a wire stem is put up your nose about 3 or 4 inches.

"I've had it done, and it's mildly uncomfortable for a few seconds," said Gregory Poland, director of the Mayo Clinic’s Vaccine Research Group.

A doctor may also do a throat swab. In some cases, if you have a "wet" cough, a doctor may also have you cough up some phlegm into a collection cup. These specimen are then packed with ice and shipped to a lab for testing.

To determine if someone has recovered from the coronavirus, at least two different nasal swabs taken at least 24 hours apart must test negative, Poland said.

Should people in their 60s be concerned? Are they considered elderly?

As with seasonal flu, people at highest risk for severe disease and death include people over the age of 60 and those with underlying conditions, according to the World Health Organization.

"Starting at age 60, there is an increasing risk of disease and the risk increases with age. The highest risk of serious illness and death is in people older than 80 years," Nancy Messonnier, director of the CDC's National Center for Immunization and Respiratory Diseases, told reporters in a recent telebriefing.

The CDC recommends that people over 60 stock up on supplies, keep away from others who are sick, limit close contact, wash hands often, avoid crowds as much as possible, avoid cruises and don't fly on planes unless absolutely necessary.

How likely are you to die from the virus?

– Aubrey from Ooltewah, Tennessee

Of the more than 586,000 people who have been infected worldwide, more than 26,000 have died. That's a death rate of about 4.6%. The WHO has previously estimated the rate at about 3.4%.

The death rate, however, varies widely based on age, health and geographic location. People who are older or who have preexisting conditions are at higher risk of severe illness.

Can someone get the coronavirus more than once?

– Randi from Arizona

Scientists aren't sure yet. For many viruses, including the MERS virus, patients are unlikely to be re-infected shortly after they recover because a protective antibody is generated in those who are infected. But scientists still need to do more research to determine if this is also the case with COVID-19 and how long those antibodies may last.

"However, in certain individuals, the antibody cannot last that long. For many patients who have been cured, there is a likelihood of relapse," said Li QinGyuan, director of pneumonia prevention and treatment at China Japan Friendship Hospital in Beijing.

Poland agreed, saying the chance of reinfection is "very likely."

Are infected people able to transmit the virus to their pets and visa versa?

– Machell from Buffalo Grove, Illinois

No, there is no evidence that pets such as cats and dogs have been infected or could spread the virus that causes COVID-19, according to the WHO.

Last month, the pet dog of a coronavirus patient in Hong Kong tested "weak" positive for COVID-19 and was put in quarantine. Scientists concluded that pet cats and dogs can test positive for low levels of the pathogen if they catch it from their owners, but pets can't get sick from the virus.

How do the coronavirus stats compare to other bad flu seasons?

– Stephanie from Atlanta, Georgia

In the U.S., influenza has caused 12,000 to 61,000 deaths annually since 2010, according to the CDC. So far this flu season in the U.S., there have been at least 38 million flu illnesses, 400,000 hospitalizations and 24,000 deaths from flu, according to the CDC.

Is it safe to swim at an indoor public pool? Can someone be infected there?

– Margaret from Knoxville, Tennessee

Properly chlorinated pool water kills viruses, but you can still catch the coronavirus at the pool through other means, including: If you touch a surface that has the virus on it, or if an infected person coughs or sneezes and the respiratory droplets enter your mouth or nose, according to the CDC.

How long does the virus live on an object like a dollar bill?

– John from Milwaukee, Wisconsin

Depending on the type of surface, the virus can stay on surfaces for a few hours or up to several days, according to the WHO. A recent study by scientists in the U.S. found that viable virus could be detected up to three hours later in the air, up to four hours on copper, up to 24 hours on cardboard and up to two to three days on plastic and stainless steel.

However, a subsequent report from the CDC found that genetic material from the virus can live on surfaces for more than two weeks. The CDC found traces of the virus' RNA, not the coronavirus itself, on surfaces in the cabins of both symptomatic and asymptomatic infected passengers on the Diamond Princess cruise ship – 17 days after passengers had left the cabins.

It's possible that you can become infected if you touch your face after touching a surface or object that has the virus on it, according to the CDC. But scientists don't think surfaces are the main way that the virus spreads; the most common form of infection is from respiratory droplets spread by a person's cough or sneeze, the CDC reports.

Meanwhile, the WHO says it is very unlikely that the virus will persist on a surface after being moved, traveled and exposed to different conditions and temperatures. That means the virus cannot spread through goods manufactured in China or any country reporting coronavirus cases.

At the same time, the WHO is reportedly encouraging people to use as many digital payment options as possible. Viruses can survive on hard surfaces like coins for days in some cases. U.S dollars, a blend of fabric and paper, are harder for viruses to stick to.

What is being given to treat the coronavirus once you’ve become infected?

– Diane from Norman, Oklahoma

There is no vaccine for the new virus and no specific antiviral medicine to prevent or treat COVID-19, so treatment consists of supportive care to help relieve symptoms and, for severe cases, care to support vital organ functions, the CDC says.

About 80% of people recover from the disease without needing special treatment, according to the WHO. For most patients, that means drinking plenty of fluids and resting, just as you would for the cold or flu.

How many children have been diagnosed with the virus? How many of them have died?

– Rosemary from Ventura, California

Among the more than 4,000 cases in the U.S. as of March 16, only 5% were people aged 0–19 years, according to the CDC. Just 2%–3% of cases in that age group had to be hospitalized, and none were in the ICU.

This week, however, health officials reported that a 17-year-old teen in New Orleans died after contracting the virus. And a 2-month-old in Nashville who tested positive for the virus could be the youngest patient in the nation, officials say. In China, at least one two-day-old infant had been infected, according to a WHO study.