" AIDS education taught us the importance of protecting our bodies from contact with other bodies, and this seems to have bred another kind of insularity, a preoccupation with the integrity of the individual immune system. Building, boosting, and supplementing one’s personal immune system is a kind of cultural obsession of the moment. I know mothers who believe this is a viable substitute for vaccination, and who understand themselves as raising children with superior immune systems. But children with superior immune systems can still pass disease. Pertussis, like polio and Hib disease and HIV, can be carried without symptoms. "

― Eula Biss , On Immunity: An Inoculation