Symptoms of COVID-19 | COVID-19 | CDC
Mar 10, 2025 · Influenza (Flu) and COVID-19 are both contagious respiratory illnesses, but they are caused by different viruses. COVID-19 is caused by infection with a coronavirus named …
Covid-19 2026: New Covid Symptoms and Variant Signs Explained
Discover how COVID-19 2026 looks now, including new COVID-19 symptoms, what to know about each new COVID-19 variant, and when to test or seek care.
Coronavirus - World Health Organization (WHO)
Feb 3, 2026 · Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus. Most people infected with the virus will experience mild to moderate respiratory …
Coronavirus disease 2019 (COVID-19) - Symptoms and causes
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.
Coronavirus Disease (COVID-19): Symptoms & Treatment
Feb 28, 2025 · COVID-19 is an illness caused by the SARS-CoV-2 virus. It spreads through respiratory droplets.
Coronavirus Symptoms: Early Signs, Serious Symptoms - WebMD
Nov 3, 2025 · Stay informed about COVID-19 symptoms & prevention. Explore WebMD's comprehensive resource for information on signs, precautions, & the latest updates
Coronavirus Resource Center - Harvard Health
Coronavirus Resource Center COVID-19 (coronavirus disease 2019) is a respiratory illness caused by the SARS-CoV-2 virus. It is very contagious, and spreads quickly. Most people with …
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, diagnosis, treatment and prevention.
Measles vs. flu vs. COVID symptoms, spread, and vaccine differences
4 days ago · With measles outbreaks, flu spikes, and COVID as a seasonal threat, learn key differences between these contagious diseases, symptoms, vaccine advice.
COVID-19 (Coronavirus Disease 2019) - MedlinePlus
May 20, 2024 · COVID-19 (coronavirus disease 2019) is a respiratory disease caused by a virus. It can be very contagious. Learn about symptoms, prevention, and treatment.