So many COVID threads not sure whereto put this one.
Study that masks due in fact help and that surgical masks were more effective than cloth masks but that both reduced transmission rates.
I’ll see if I can find the actual study and not just the twitter feed with some highlights.
This was a longer article linked within the twitter thread. The Impact of Mask Distribution and Promotion on Mask Uptake and COVID-19 in Bangladesh | IPA
And the full paper can be found here https://www.poverty-action.org/sites/default/files/publications/Mask_RCT____Symptomatic_Seropositivity_083121.pdf