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.

Information for Canadians on COVID-19 (coronavirus) including current cases, risk, monitoring, COVID-19 variants and how to get updates.

Apr 17, 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 …

Apr 13, 2026 · The heavily mutated new BA.3.2 COVID-19 variant, aka "cicada," is circulating in at least 31 U.S. states, data show. What to know about its spread and symptoms.

Mar 31, 2026 · While news of a new COVID-19 variant may be alarming to some, infectious disease specialist Dr. Isaac Bogoch says the discovery will change little about how the virus is diagnosed and …

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.

Daily and weekly updated statistics tracking the number of COVID-19 cases, recovered, and deaths. Historical data with cumulative charts, graphs, and updates.

Feb 28, 2025 · COVID-19 is an illness caused by the SARS-CoV-2 virus. It spreads through respiratory droplets.

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.

Learn about the types of COVID-19 treatments, symptom management, and recovery. Information for healthcare workers about COVID-19. Guidance, tools, and resources for health departments to …