This was a great read. Bacterial exposure to build an immunity just to cause more deaths. I consider myself very lucky when it comes to illnesses. If a good immunity was transferable through blood transfusion, all my recipients would be very lucky. I don't know if it already exists so correct me if I'm wrong, I deal with computers, it's the one language I can speak with ease. Growing up my parents made us eat oranges with every meal, we'd also have some honey before bed, a hot drink made from roots - it is the most bitter thing you could ever drink -, and I'd normally drink water or green tea to cure a headache. As you can already tell, my parents are very traditional. I'm very grateful for this cuz I never fall sick and I have an occasional cold once every 2 years in August. So if someone can develop a machine that can transfer immunity, I'll be glad to participate in that project just to understand why I'm so lucky.

Blood group O+