Do you have a high immunity to getting sick?

supposedly you get higher immunity after you've recovered from a bug because your body would have created anti-bodies which help the white blood cells to destroy the bacteria. So if you catch the same bug again you won't become ill because the body will react faster and antibodies don't go away so you probably won't even notice that this bug was inside you. This is why parents want children to get chicken pox when they are young so they are immune to it in the future and why you get a whole load of vaccinations(injections). But it also depends if you take drugs which kill the bacteria so it wouldn't be really your body killing them.