I live in an island where during a viral outbreak some were advocating for chloroquine against the Chikungunya virus. The initial in-vitro tests were promising but it turns out during human trials it has a reverse effect and delayed adaptive immune responses (1). It's sad to see scientific method destroyed by politics and social networks.
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5977261/