Quoted from RTR:More science based info for those that are into that sort of thing. Confirms that masks help, but higher performance masks are needed to protect against the smaller particles. Mask performance is better on the exhale.
Confirming that if you care about the effect you may have on others’ health you should wear a mask.
https://www.thelancet.com/journals/lanres/article/PIIS2213-2600(20)30245-9/fulltext
??? Article doesn’t want say anything about masks, but focuses on airborne aerosol distance travel and ventilation.