No, natural immunity is very good: it has to be, or humans would die out. Much better than vaccines, and how is that obvious? Because we have to get two shots, or boosters at intervals with a lot of vaccines -- some every five years, like that pneumonia one, or tetanus. Not so with surviving a given disease. Catch it once, good for life.You just made that up.Your husbands antibodies are stronger than any vaccine or injection could ever offer.
I admit there is that bit about surviving the disease --- if you don't do that, the antibodies don't count.