New study may well explain why hydroxychloroquine doesn’t work in humans.

Unlike the tissue cultures, human lung cells don’t have the proper enzymes, so virus enters by different receptors that hydroxychloroquine can’t affect.

https://theconversation.com/why-hydroxychloroquine-and-chloroquine-dont-block-coronavirus-infection-of-human-lung-cells-143234

Remember, the 2005 study that everyone claims is a conspiracy was done in Vero E6 cells. These are green monkey KIDNEY cells, not lungs.