Michael Osterholm, a member of Joe Biden's coronavirus advisory team, regarding doubling up: "I do not support the idea of two masks"...

https://www.radio.com/kdkaradio/news/national/osterholm-raises-concerns-over-double-masking-recommendation

The CDC director, regarding n95s for the general public; she is: " recommending the general public not to wear them"...

https://6abc.com/n95-mask-cdc-recommendation-dr-rochelle-walensky-what-type-of-is-the-best/10092451/

Here's more from Osterholm this summer, describing aerosols...

https://www.youtube.com/watch?v=3CglBhn0znM&feature=youtu.be