Coronaviruses are a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, they cause respiratory tract infections that can range from mild to lethal.

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 illness and …

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

These dashboards show trends in Washington state for COVID-19, influenza (flu), and respiratory syncytial virus (RSV). The data on these dashboards help us monitor early signs of disease spread, …

Apr 1, 2026 · The COVID-19 variant BA.3.2, nicknamed "Cicada," has been detected in at least 23 countries and half the states in the U.S.

Mar 13, 2026 · 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.

The COVID-19 virus is still circulating in King County and we’re still seeing hospitalizations and deaths. There’s also no guarantee that the virus won’t continue to evolve in unpredictable ways. Older adults …

COVID-19 is an illness caused by the SARS-CoV-2 virus. It spreads through respiratory droplets.

Mar 30, 2026 · Learn about the COVID-19 Cicada variant, including symptoms, how it spreads and simple steps to protect yourself.

Mar 2, 2026 · COVID-19 touched off a global pandemic in 2020 that has sickened and killed millions over more than three years. It has also driven incredible advancements in vaccine development and …