HCQ for COVID-19
1st treatment shown to reduce risk in
March 2020, now with p < 0.0000000001 from 426 studies, used in 59 countries.
No treatment is 100% effective.
Protocols combine treatments.
Quinine was considered effective for respiratory infections as early as 1889.
Edwin Wiley Grove et al., 1 Jan 1889, preprint, 1 author.