From https://biology.stackexchange.com/a/90193/56476
very small airborne microorganisms, are in many instances attached to bigger particulate substances in the air, whether liquid micro droplets or solid particles. ... but this may be reason for higher risk of respiratory infectious diseases when PM2.5 air pollution gets high.
Can someone confirm this great logic?
I think it is true, but just need a confirm from the public! :)
Many thanks.