From Mayo Clinic and good points....if a person deals with major health issues and a weak immune system, then more care needs to be taken by that person(s). If you are sick, stay home for goodness sake.
Herd immunity and COVID-19 (coronavirus): What you need to know - Mayo Clinic
Again, I choose the great Vit C, Vit D, Zinc and my faithful Grape Seed Extract to keep myself going good.
Even if and when a vaccine hits the population, I will not take it.