12 h 30 jan 2020 ano - CDC: "does *not* currently recommend the use of face masks for the general public."

Descrição:

https://www.cdc.gov/media/releases/2020/t0130-novel-coronavirus-update-telebriefing.html
https://web.archive.org/web/20200131010304/https://www.cdc.gov/coronavirus/2019-nCoV/summary.html
https://web.archive.org/web/20200131023610/https://www.cdc.gov/coronavirus/2019-ncov/about/prevention-treatment.html

Adicionado na linha do tempo:

Data: