How did he know this? Because of research done by the National Institutes of Health, of which he is the director. In connection with the SARS outbreak – caused by a coronavirus dubbed SARS- CoV – the NIH researched chloroquine and concluded that it was effective at stopping the SARS coronavirus in its tracks. The COVID-19 bug is likewise a coronavirus, labeled SARS-CoV-2. While not exactly the same virus as SARS-CoV-1, it is genetically related to it, and shares 79% of its genome, as the name SARS-CoV-2 implies. They both use the same host cell receptor, which is what viruses use to gain entry to the cell and infect the victim.
The Virology Journal – the official publication of Dr. Fauci’s National Institutes of Health – published what is now a blockbuster article on August 22, 2005, under the heading – get ready for this – “Chloroquine is a potent inhibitor of SARS coronavirus infection and spread.” (Emphasis mine throughout.) Write the researchers, “We report…that chloroquine has strong antiviral effects on SARS-CoV infection of primate cells. These inhibitory effects are observed when the cells are treated with the drug either before or after exposure to the virus, suggesting both prophylactic and therapeutic advantage.”