Recently got a diphtheria/pertussis/tetanus booster. I've actually had measles, mumps, and chicken pox -- does having them, as opposed to getting vaccinated, leave greater immunity? I know I am not immune to smallpox; my vaccine (which I remember clearly) didn't take, and I have no scar -- sure sign of no immunity.

My immune system stays busy guarding me against tree sperm, animal dander, and the dreadful threat of celery molecules. I think Glenn Beck must be running it.