Thanks. That was my thinking but glad to see it confirmed.

Kind of ironic that you’re not allowed to wear an N95 with an exhale valve, but are encouraged to wear a surgical mask, bandana, cloth mask, or dirty T-shirt, none of which provide any source control.

Again, the elephant in the room is respiratory viruses in general, and SARS-2 in particular, spread via aerosols. Non-N95 face coverings cannot block aerosols. Indeed mask wearing leads to deeper breaths to maintain homeostasis (this has been studied), therefore lead to a greater net volume of air, therefore lead to increased aerosol emission before even accounting for the potential to nebulize large droplets into a shower of tiny aerosol particles. But I digress.