A supermarket cashier waits for costumers behind a makeshift plastic curtain as a precaution against the spread of the new coronavirus, in Buenos Aires, Argentina, Monday, March 16, 2020. 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/Natacha Pisarenko), APTOPIX