Source: NYT > Health
Article note: That pretty solidly comes down on the "Aerosol (or at least fine particle) transmission" side of things, which at this point should surprise no one.
Good mask seals with electrostatic trapping layers on your face, HEPA filters and/or UV-C in air handlers, fresh circulating air where possible.
While any face covering is better than nothing, clear plastic shields and masks with exhale valves allow large plumes of particles to escape and may also expose the wearer to more germs.
