Wearing a mask

[S Landreth]

[S Landreth]

Risk of COVID-19 infection between infected and non-infected individuals with different mask combinations

The big picture: Fitted particle-filtering masks like N95s are up to 75 times more effective at preventing infection with COVID-19 than surgical masks, according to a study published recently in the Proceedings of the National Academy of Sciences.

It will take 25 hours for an infectious dose of COVID-19 to transmit between people wearing non-fit-tested N95 respirators but if they're wearing a tightly sealed N95, they'll have 2,500 hours of protection, per a study reported by the WSJ. https://www.axios.com/n95-mask-prote...36707fee5.html

[S Landreth]

CDC updates mask guidance, says N95s offer 'highest protection'

The Centers for Disease Control and Prevention on Friday updated its guidance on masks for the general public, now saying that people "may choose" to wear N95 and KN95 masks because they offer the best protection against Covid-19. https://www.nbcnews.com/health/healt...asks-rcna12302

[S Landreth]

[S Landreth]

[S Landreth]

https://www.ada.org/publications/ada...ntal-practices

[S Landreth]

[S Landreth]

[S Landreth]

[S Landreth]

[S Landreth]

[S Landreth]