Regarding the mask-aspect, many people argue that there is no evidence for there effectiveness. ZEITONLINE has compiled an interesting list that might counter this claim:

Health Affairs__: Lyu & Wehby, 2020
Cochrane__: Jefferson et al., 2011
[Lancet: Chu et al., 2020 (https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(20)31142-9.pdf)
Proceedings__: Stutt et al., 2020
The American Journal of Tropical Medicine and Hygiene__: Leffler et al., 2020
Science__: Prather et al., 2020).