POTUS pushed research for hydroxychloroquine and suggested he might take it.
Possibly suggesting a preventative dose?
"To prevent malaria: Start taking the medicine 2 weeks before entering an area where malaria is common. Continue taking the medicine regularly during your stay and for at least 8 weeks after you leave the area."
https://www.drugs.com/hydroxychloroquine.html
https://8kun.top/qresearch/res/8687013.html#q8687699
It is not clear why hydroxychloroquine is effective at treating autoimmune diseases. It is believed that hydroxychloroquine interferes with the communication of cells in the immune system.
https://www.rheumatology.org/I-Am-A/Patient-Caregiver/Treatments/Hydroxychloroquine-Plaquenil
Chuck Pierce has been saying a similar thing.
https://www.charismamag.com/blogs/prophetic-insight/44701-chuck-pierce-prophesies-massive-plague-like-invasion-will-test-us-through-passover