WEARING #Masks IS CONSISTENTLY PROTECTIVE
If metaanalysis is tricky simple visualisations help
These are key data from Brainard review (Fig 2)
UK Deputy CMO what is not persuasive about this?
Small benefits will help us all with #COVID19 threat
https://www.medrxiv.org/content/10.1101/2020.04.01.20049528v1
You can follow @DrDaveSaunders.
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