COVID-19 (coronavirus disease 2019) is a disease caused by a virus named SARS-CoV-2. It can be very contagious and spreads quickly.

The symptoms of COVID-19 are variable depending on the type of variant contracted, ranging from mild symptoms to a potentially fatal illness. [43][44] Common symptoms include …

Nov 27, 2025 · COVID-19 is caused by the SARS-CoV-2 virus, which spreads through the air in infectious respiratory particles from an infected person. Transmission is more likely in close …

Sep 15, 2025 · COVID-19 viral activity is high in the U.S., according to CDC data. Here's a look at the latest, including test positivity by region.

Oct 21, 2025 · Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.

5 days ago · There is no cure for COVID-19, but individuals can be protected against severe illness through vaccination. Learn about the symptoms, treatment, and prevention of COVID-19.

May 20, 2024 · COVID-19 (coronavirus disease 2019) is an illness caused by a virus. This virus is a coronavirus called SARS-CoV-2. It spreads when a person who has the infection breathes …

Sep 26, 2025 · COVID-19 is a vaccine-preventable disease mainly spread by respiratory droplets. While most have mild symptoms, others may get severely ill and need medical treatment.

COVID-19 is the disease caused by SARS-CoV-2, the coronavirus that emerged in December 2019. Coronaviruses are a type of virus. There are many different kinds, and some, like …

Learn about COVID-19, the virus that causes it, how it spreads, and its variants.