Pregnancy is boolean. A person's viral load is not a boolean value.
The umbrella is a better comparison. My umbrella doesn't prevent 100% of the rain from coming in contact with me. This is good enough that the umbrella is still standard practice.
The umbrella is a better comparison. My umbrella doesn't prevent 100% of the rain from coming in contact with me. This is good enough that the umbrella is still standard practice.
Whatever that number is, if we limit the number of particles in the air, we decrease the statistical probability that a person will come in contact to a number of particles exceeding that number.
It's a "solution to pollution is dilution" issue.
> it might actually make sense to just give everyone a very small infectious inoculum as a form of vaccination.
The biggest issue with this, as I understand, is straddling the line between causing an immune response and hurting the patient. There are live vaccine viruses, but most (all?) attenuate the virus to prevent the latter.