Everybody knows that wearing a mask protects others from your illness, but now (as I’ve suspected right along) there’s good evidence that it protects the mask-wearer as well: https://www.nytimes.com/live/2020/11/10/world/covid-19-coronavirus-live-updates/covid-cdc-guidelines-masks
Philip Brewer
Writer: science fiction and fantasy, personal finance, and Esperanto
