[ThaVirus]

Ive been on a huge immune system kick lately. So many questions..

I've read that a large amount of your immune system is found in the good bacteria in your stomach. They say antibiotics kill bacteria indiscriminately. So is it really worth it to be taking antibiotics all willy nilly?

Also, as far as I'm aware I've never had the flu but I've been alive for 25 years. My body has to have come in contact with it at some point. So did just a small enough amount make its way into my body so that my immune system was able to deal with it before 1) the virus took over or 2) my innate immune response started flipping its shit?

And how in balls' name can you randomly develop an allergy to something?

I need all da ansuhs, bruh.