Nothinguptop, you’ve never worked with microphones, right? ‘Cos if you had you’d know how essential a ‘pop shield’ is. Hold your hand in front of your face and say “Peter Piper picked a peck of pickled peppers”; feel all those little puffs of air hitting your hand? If you could see the air they’d look like smoke rings. Now try again with any old bit of fabric as a mask. That’s why you always put a pop shield on vocal mics, and that’s one reason that any old bit of fabric helps prevent other people being infected.
No reference to “MSM” at all, just a little experiment anyone can do for themselves. No “MSM” reference in all the citations from the scientific literature that Dredd gave you either; why have you ignored this evidence? Here they are again:
Howard et al (2020). Face Masks Against COVID-19: An Evidence Review. Preprints.
The use of masks to protect against respiratory infections: an umbrella review. Enfermedades Infecciosas y Microbiología Clínica.
Kähler & Hain (2020). Fundamental protective mechanisms of face masks against droplet infections. Journal of Aerosol Science.
Landi et al. (2020). Should face masks be worn to contain the spread of COVID-19 in the postlockdown phase? Transactions of the Royal Society of Tropical Medicine & Hygiene.
Salter (2020). Reinventing Cloth Masks in the Face of Pandemics. Risk Analysis.
Lima et al. (2020). Cloth face masks to prevent Covid-19 and other respiratory infections. Revista Latino-Americana de Enfermagem.
And for anyone who wishes to read those reviews’ conclusions, they’re here.
Seeing as you’d been informed of the science (and I know you read it because you accused Dredd of being “part of the conspiracy” in reply), I have to assume that you’re actually trying to encourage the spread of infection and thereby increase the death rate. So why are you doing that?