not sure if this has been posted previously:
Wikipedia: The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH).
most authors CDC:
Aug 2005: NCBI: Virology Journal: Chloroquine is a potent inhibitor of SARS coronavirus infection and spread
Conclusion
Chloroquine is effective in preventing the spread of SARS CoV in cell culture. Favorable inhibition of virus spread was observed when the cells were either treated with chloroquine prior to or after SARS CoV infection...
Severe acute respiratory syndrome (SARS) is an emerging disease that was first reported in Guangdong Province, China, in late 2002...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1232869/
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