1. @WHO weighs in on the "to mask, or not to mask (the public)" question. "...there is currently no evidence that wearing a mask ... by healthy persons in the wider community setting, including universal community masking, can prevent them from infection... with #COVID19."

2. @WHO guidance doc on masks says most transmission of #Covid19 occurs from symptomatic people. (the argument @CDCgov used to say people should wear cloth masks is to prevent presymptomatic transmission.)
document is here: https://www.who.int/publications-detail/advice-on-the-use-of-masks-in-the-community-during-home-care-and-in-healthcare-settings-in-the-context-of-the-novel-coronavirus-(2019-ncov)-outbreak