My philosophy is this: there is no such thing as a pure vegan. you just do the very best you can. if taking a vaccine that may contain animal ingredients (and was mostly likely tested on animals) will keep you healthy, then take it. a sickly vegan doesn't do anyone any good. animal ingredients are a by-product of the food industry. they're everywhere. testing on animals is a by-product of a society that views animals as property. being a healthy vegan advocate will help to create a vegan world, thereby ending the use and abuse of non-human animals.
"Live simply so others may simply live" ~ Gandhi