Coronavirus - Wikipedia
Coronaviruses are a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, they cause …
Coronavirus Disease 2019 (COVID-19) | Covid | CDC
COVID-19 (coronavirus disease 2019) is a disease caused by a virus named SARS-CoV-2. It can be very contagious and spreads …
Coronavirus - World Health Organization (WHO)
Aug 6, 2026 · Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus. Most people infected with …
COVID-19 - Wikipedia
People with the COVID-19 infection may have different symptoms, and their symptoms may change over time.
Symptoms of COVID-19 | Covid | CDC
Mar 10, 2025 · Influenza (Flu) and COVID-19 are both contagious respiratory illnesses, but they are caused by different viruses. …
Coronavirus disease 2019 (COVID-19) - Symptoms and causes
Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and …
Coronavirus Symptoms: Early Signs, Serious Symptoms - WebMD
May 31, 2026 · COVID-19 is a respiratory condition that develops when a coronavirus infects the body. Some people are infected but …
Coronavirus Disease (COVID-19): Symptoms & Treatment
COVID-19 is an illness caused by the SARS-CoV-2 virus. It spreads through respiratory droplets.
COVID-19 - Johns Hopkins Medicine
COVID-19 is the disease caused by SARS-CoV-2, the coronavirus that emerged in December 2019. Learn about symptoms, …
Coronavirus disease (COVID-19)
Nov 27, 2025 · COVID-19 is caused by the SARS-CoV-2 virus, which spreads through the air in infectious respiratory particles from …