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.. "/>
Coronavirus disease (COVID-19) Weekly Epidemiological Update and Weekly Operational Update. The Weekly Epidemiological Update provides an overview of the global, regional and country-level COVID-19 cases and deaths, highlighting key data and trends; as well as other pertinent epidemiological information concerning the COVID-19 pandemic. What is a coronavirus? Coronaviruses are a large family of viruses, but only seven of its members infect humans. Four types cause minor illnesses like the common cold, while other coronaviruses. If you are exposed to COVID-19, it means that you came into “close contact” with someone infected with COVID-19 within 48 hours of their symptom onset or positive test result. A “close contact” is currently defined by the CDC as someone who was within six feet of an infected person for a cumulative total of 15 minutes or more over a 24.