The CDC began closely monitoring an outbreak caused by a novel coronavirus strain first identified in Wuhan, China, in December 2019, which quickly spread to southeast Asia, Europe, Canada and the United States.
The World Health Organization declared COVID-19 a pandemic on March 11, 2020.
The spread of COVID-19 has led to closed schools and businesses, quarantines in first responders, and changes in service delivery response.
Find COVID-19 breaking news and actionable information about the COVID-19 pandemic at the FireRescue1 COVID-19 Resource page.
Following is a timeline illustrating how COVID-19 has progressed in the U.S.