to some degree, and the best ones 'N95/KN95' work exceptionally well...and they are now available to all.
Here's Dr. Fauci answering Rand Paul's "question/statement' on mask usage (see link)...and when he can get a word in edgewise, explains that Sen. Paul is stuck on the 'no longer' dominant "Wild Type' (i.e. Original) version of COVID-19, not the newly emerging variants that are being shown to evade immunity...as we've all come to realize. Dr. Fauci can not be any more assertive in his statement that masks are necessary.
"Science" has shown us that SARS-CoV-2 mutated numerous times, creating highly infectious variants that require people to use the high quality masks that have been demonstrated to work effectively...Dr. Fauci's long association with that science enables him to see what Rand Paul and Baron cannot...thank goodness we don't have to rely on them.
Apparently, BVZ is taking this failure on his part very hard and is desperate for an escape...there is none, so he 'Gaslights' ad nauseam...like me, be ready for more.
Link: https://youtu.be/PEmOG16aEmI?t=2