A person walks along the Las Vegas Strip devoid of the usual crowds after casinos have been ordered to shut down due to the coronavirus Wednesday, March 18, 2020, in Las Vegas. For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. (AP Photo/John Locher)

March 19, 2020