Reason that past clinical studies, focusing on health-care worker outcomes, are not the best indicator is that masks for *source-control* is not an individual level variable. It's like asking if filters on car exhausts lower air pollution by measuring the air ... inside each car.
-
-
Strikingly from that study, there is a dose-response effect for the significant protection from masks. Dose-response is a pretty big signal. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3322931/ …pic.twitter.com/Zp9sfzzQ75
-
We outline both the logic and previous existing studies for *source control* here. (Current as of few months ago).https://www.preprints.org/manuscript/202004.0203/v2 …
- Show replies
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.