A couple sit underneath the blossoming cherry trees in Washington during the first week of the coronavirus shut down in DC. The usually busy time would have visitors crowding the area.

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.