The 2019 coronavirus, also called COVID-19, is a new illness that affects the airways and lungs. It’s caused by a type of virus, known as a coronavirus.
Coronaviruses are a large family of viruses that can infect humans and animals. Some cause mild respiratory infections, such as the common cold, while others cause more severe illnesses, such as severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS).
The coronavirus that causes COVID-19 has not been seen in humans before.
The symptoms are usually mild and tend to develop slowly. They generally appear 2 to 14 days after exposure to the virus, and include:
In some cases, the condition doesn’t cause any symptoms.
It’s thought that the majority of people (4 in 5) who catch the virus get better without special treatment. However, a small number (around 1 in 6) can develop pneumonia and difficulty breathing, which can be life-threatening.
Your risk of developing a serious illness increases if you are elderly or have an existing medical condition, such as heart disease or diabetes.
Seek medical help immediately if you have symptoms of coronavirus:
Do not go to your doctor’s office or the emergency room, instead call your country's dedicated coronavirus helpline. If it's an emergency, phone for an ambulance and tell them your symptoms so that measures can be taken to reduce the risk of infecting others.
If you live with or have been in contact with someone who has symptoms of coronavirus, you will need to self-isolate for 14 days. This means you should stay at home and avoid being in the same room as others in your house. You can read more about how to self-isolate in the 'avoiding contact with others' section below.
The coronavirus can be passed from one person to another. However, as it’s a new illness, research on exactly how the virus is spread is ongoing.
It’s thought that the virus is passed from person to person in small droplets that are released when an infected person coughs or sneezes. Others can catch the infection if they breathe in these droplets or if they touch an object or surface the droplets have landed on and then touch their eyes, nose or mouth.
At present, there is no vaccine to reduce your risk of catching the coronavirus. Because the infection is most likely spread through cough droplets, you can reduce your risk of infection by:
Some people who have symptoms, signs or risk factors that suggest they may have been exposed to the new coronavirus may be asked to stay away from other people for up to 14 days. This is known as self-isolation.
If you are told to self-isolate, you should:
While the outbreak is ongoing, health agencies and governments worldwide recommend that you should stay at home to help reduce the spread of the coronavirus. This is a practice known as physical distancing (or social distancing). There are many ways to keep a safe distance from others during the coronavirus outbreak, including:
You should stay at home and only go out for essential trips, like buying food.
At present, there is no specific medication to prevent or treat the coronavirus. The current treatment for anyone with the infection includes supportive care to treat symptoms.
As it is caused by a virus, it cannot be treated with antibiotics, which work against bacteria, not viruses.
To find out more about the coronavirus, visit our coronavirus hub.
To separate coronavirus facts from myths, visit covid-19facts.com.
Written on 24 February 2020
Reviewed on 26 March 2020
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Important: Our website provides useful information but is not a substitute for medical advice. You should always seek the advice of your doctor when making decisions about your health.