Originally Posted by
19Sandy
There might be cases of natural immunity but it wouldn't be a good idea to determine if you are one of the lucky ones.
I have a relative who has natural immunity to polio. You know us older folks (lol) got the shot on an upper arm and have tiny scar (no oral vaccine). So, he got 3 injections and never scarred - a very rare occurrence that meant he had natural immunity. Now if there was no vaccine, he would not get polio or be affected by the illness. However, fast forward for a few years when it is time to sign up for the draft, - and he has NO SCAR - he had to track down the physician (and old dude now) and get documentation that he had 3 shots and had natural immunity. Yes, the doctors wanted to study him! And, he rarely gets sick with anything.
Anyway, On the most recent episode of Fear the Walking Dead - a guy revealed a deep healed over bite from an infected - and he didn't die. So, natural selection would permit a very small portion of the population to survive an epidemic.