origin of covid-19 virus causes effects control treatment and prevention
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Coronaviruses are a family of viruses that can cause respiratory illness in humans. They get their name, “corona,” from the many crown-like spikes on the surface of the virus. Severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS) and the common cold are examples of coronaviruses that cause illness in humans.
The new strain of coronavirus, COVID-19, was first reported in Wuhan, China in December 2019. The virus has since spread to all continents (except Antarctica).
This so-called “incubation period,” the time between becoming infected and showing symptoms, can range from two to 14 days. The average time before experiencing symptoms is five days. Symptoms can range in severity from very mild to severe. In about 80% of patients, COVID-19 causes only mild symptoms.The CDC says you may have coronavirus if you have these symptoms or combination of symptoms:
Fever or chills.
Cough.
Shortness of breath or difficulty breathing.
Tiredness.
Muscle or body aches.
Headaches.
New loss of taste or smell.
Sore throat.
Congestion or runny nose.
Nausea or vomiting.
Diarrhea.
Additional symptoms are possible.
Symptoms may appear between two and 14 days after exposure to the virus. Children have similar, but usually milder, symptoms than adults. Older adults and people who have severe underlying medical conditions like heart or lung disease or diabetes are at higher risk of more serious complication from COVID-19.