https://en.wikipedia.org/wiki/De_facto_standard
https://www.upi.com/Health_News/2020/03/18/Flu-drug-used-in-China-immune-system-research-show-potential-COVID-19-treatments/5641584545063/
https://en.wikipedia.org/wiki/De_facto_standard
https://www.upi.com/Health_News/2020/03/18/Flu-drug-used-in-China-immune-system-research-show-potential-COVID-19-treatments/5641584545063/