Update: the University of Minnesota is organizing a trial to treat 1,500 people with hydroxychloroquine (alone) who were exposed to the virus from infected family members or as healthcare workers but are not yet ill. The study relied on laboratory experiments in China that found hydroxychloroquine inhibited the infection.
“If effective, this may become a worldwide standard of care for helping prevent disease in other healthcare workers and people exposed,” Dr. David Boulware, a U of M professor of medicine, said in announcing the study. Hydroxychloroquine is an off-patent, generic medicine that is inexpensive. A five-day treatment course would cost approximately $12.”
https://med.umn.edu/news-events/covi...sity-minnesota
https://www.nature.com/articles/s41421-020-0156-0