COVID-19 is an illness caused by the SARS-CoV-2 virus. Symptoms can include fever or chills, fatigue and body aches, sore throat, headache, cough and shortness of breath. In severe cases, COVID-19 can ...

Fatigue is common with viral illnesses, including COVID-19. COVID fatigue has to do with substances called cytokines. Your immune system produces cytokines when a virus invades your body.

body aches, fatigue, coughing, or a sore throat. Most people with either flu experience mild to moderate illness, though it ...

The Centers for Disease Control and Prevention (CDC) has confirmed the first case of severe bird flu in the ... muscle or body aches, fatigue and shortness of breath, the CDC says.