In this Tuesday, March, 10, 2020 photo, paramedics test samples taken from patients suspected of being infected with the new coronavirus, at a laboratory in the southwestern city of Ahvaz, Iran. 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. (Amin Nazari/ISNA via AP)

March 11, 2020