“So during surgery the doctor doesn’t sneeze or accidentally transfer bodily fluids into the open wound..”
Exactly.
Snot stoppers.
The pore size of a mask is so much larger than a virus. It’s like using a chain-link fence to stop a mosquito.
The pore size of a mask compared to the size of a virus is like putting a yellow concrete posts every five miles to keep cars from driving onto your property.