Thread by @MonicaGandhi9

Thanks Dr. McBride. I think laying out the evidence on why ceasing outdoor masking (except when at rallies or packed crowds) based on biology will help ease us back to normal, shows trust of the public & is nuanced/tiered messaging.

https://twitter.com/drlucymcbride/status/1385266385903816707

My key points are as follows: 1) People know when they are outside (!); 2) A study in Wuhan China with careful contact tracing shows 1 of 7324 infections seem to be connected with outside transmission (& no outbreaks);
onlinelibrary.wiley.com/doi/10.1111/in…; 2) A meta-analysis from UCSF shows

risk inside >20x more than outside; 3) Scoping review from University of Canterbury shows outdoor transmission rare, citing the opportunity costs of " impact on physical and mental health and wellbeing" not gathering outside.”canterbury.ac.uk/science-engine…

4) < 1/1000 transmissions occur outside in study>232,000 infections, Ireland (tweeted reference prior). @DLeonhardt nuance in NYT today (as well as gathering with children low risk of COVID when parents vaccinated); agree show compassion towards others
nytimes.com/2021/04/22/bri…