The World Health Organization declared COVID-19 a pandemic on Mar. 11, 2020.
The CDC began closely monitoring an outbreak caused by a new coronavirus strain first identified in Wuhan, China in December 2019, which quickly spread to southeast Asia, Europe, Canada and the U.S. The first case in the United States was announced on Jan. 21, 2020, in the state of Washington, where the patient recently returned from Wuhan.
The World Health Organization declared the novel coronavirus outbreak a global health emergency on Jan. 30, 2020. The announcement came shortly after the first human-to-human transmission of the virus in the U.S. was confirmed by the CDC.
Officially named COVID-19 by the World Health Organization on Feb. 11, 2020, the novel coronavirus is thought to be spread by respiratory droplet transmission and/or contact with infected patients.
Find COVID-19 breaking news, what EMS needs to know about the novel coronavirus and tips for EMS leaders in how to prepare for and educate on the COVID-19 pandemic here.
(AP Photo/Mark Schiefelbein)