>I haven't come across any information that would indicate that we can generalize a person's immune system to be better than another's, There's definitely peop

>I haven't come across any information that would indicate that we can generalize a person's immune system to be better than another's, There's definitely people who seem to get sick all the time and people who don't. Ask any schoolteacher and they'll tell you that for every cough/cold/whatever that goes around there's a couple kids that always get it and some that never do. Of course there's other variables like hand washing and whatnot but there's probably still some differences between people. Whether these are genetic or environmental (e.g. nutrition) I don't know.