If, which seems likely, that the immunities stay with one for at least six months, and the immune system remembers the code, to bring on, what is needed to defeat it, a second time, with 50% of the populace taking the vaccine, and authorities saying perhaps only 43% need to be vaccinated for herd immunity, due to the fact, that certain forms of the common cold, of which there are around 27–35, give immunity, that should be enough to wipe it out, for the vast majority.