What's in the ice? I'm thinking some 90 million year old microbe that living creatures no longer have ant-bodies for and is air borne. It's why Hydraulic Fracturing rigs pump hundreds of gallons of high power antibiotics and sterilizing agents (for real) into the solution, to kill possible microbes that might have been trapped in the deep layer rocks.
for fucks sake
1) Your antibodies are not inherited. I repeat they are not
inherited.
2) Your antibodies are all randomly generated. The human *adaptive immune system is one whole gambit of "I will randomly generate one antibody that will bind to one antigen that is a part of a pathogen" and plays the game by creating millions of outputs
3) You can lose immunity to an organism you are immune time in your own life time. Its natural.
4) When it comes to viruses they are really niche in hosts, a couple of centuries of genetic drift alone can potentially put them out of their game
people really need to stop going microbe=pathogen
or even opportunistic pathogen = true pathogen
the only microbes that are obligate pathogens as an entire kingdom are viruses and antibiotics wouldn't even work against those.
Those microbes are important, if we tried to wipe out every microbe we find in a weird environment, we wouldn't have
taq for DNA polymerization today.