Q: I bought a mask that suggests putting a coffee filter inside is beneficial. Is there any truth to this?
A: That could help, but we also know that a two-layer cloth mask is very effective when coupled with social distancing.
The most important thing is consistent wearing of face coverings that cover your nose and mouth.
This has to be combined with social distancing of at least 6 feet. Inside activities will always be more risky than those that occur outdoors.