Math (Stats) applied in Coronaviruses Pandamic

Math (Stats) applied in Coronaviruses pandamic, by controlling the Reproduction number Ro < 1 via :
1) self protection : frequent wash hands, don’t shake hands / touch face / eyes / nose…
2) wear mask in enclosed environment (meeting room, church, shop, cinema, office… ) eg. SG COVID19 major Clusters in 2 SG churches, Hyatt Hotel Conference room, Wizlearn Technologies, CNY Loy Hei party,…

Malady math: The key statistic that determines your chances of getting coronavirus