Natural exposure immunity evidence existed even historically from the Athenian plague of 430 BC whereby historical documents showed that recovered persons were protected when re-exposed to infection
'The same man was never attacked twice and certainly not fatally', this was known dating back 430 BC; this is natural immunity (natural acquired-adaptive immunity) that doctors disregarded for COVID
This is natural immunity, below, from 430 BC. We knew it existed yet the moronic health officials around us denied it. Criminals. For a failed gene injection. Imagine, these observations were made over 2,000 years before we ever knew about the immune system and that microbial pathogens can cause disease.
SOURCE:
"The best vaccination is to get infected yourself." - Dr. Anthony Fauci
FLASHBACK: Dr. Fauci's Take On Natural Immunity
https://www.youtube.com/watch?v=v_UUH0G8duU
They can't even accept the life long immunity conferred by Spanish flu or that mask didn't work in 1918 either.