Helicopters fly over a couple of paddle boats in the Tidal Basin near the Jefferson Memorial with blossoming cherry trees during the first week of the virus shutdown in Washington. Usually the area would be packed with visitors but the virus has slowed activity.

The coronavirus outbreak that started in Wuhan, China, is changing rapidly. The respiratory infection, named COVID-19 by the World Health Organization (WHO), is closely related to SARS and MERS. The majority of cases are no longer in China, and the disease has been diagnosed in more than 100 other countries.