Are masks effective at reducing the chance of contracting viruses that cause respiratory illnesses like COVID-19?

(Broad Question)

In order to help answer the broad question of "Are masks effective at reducing the chance of contracting viruses that cause respiratory illnesses like COVID-19", see a list of more specific questions answered below. If there are other specific questions you believe would be helpful to understand the broad question, add them by clicking "Add a Question".

Does a surgical/medical mask reduce the chance of contracting viruses that cause respiratory illnesses like COVID-19?
11 Studies (2003 to 2021)
Color key: Lit. review Highly regarded source No info
Color key: Lit. review Highly regarded source No info
Does a cloth mask reduce your chance of contracting viruses that cause respiratory illnesses like COVID-19?
8 Studies (2020 to 2021)
Color key: Lit. review Highly regarded source No info
Color key: Lit. review Highly regarded source No info
Does a respirator/N95/KN95 mask reduce the chance of contracting viruses that cause respiratory illnesses like COVID-19?
4 Studies (2017 to 2021)
Color key: Lit. review Highly regarded source No info
Color key: Lit. review Highly regarded source No info