FILE - In this Feb. 27, 2020 file photo, shows Professor Didier Raoult, director of the Mediterranean institute of infection poses at La Timone hospital in Marseille, southern France. French President Emmanuel Macron has flown to Marseille Thursday April 9 2020 to meet with the prominent virologist who has championed the use of anti-malaria drug chloroquine to help fighting the coronavirus. Raoult, whose study has been taken up by U.S. President Donald Trump, believes the chloroquine can help cure the COVID-19 disease. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Daniel Cole, File)