I had a lot of vaccinations as a child - the normal ones that were available at the time (no measles mumps or rubella jabs then - what we did was do the rounds of visiting all the children who had these illnesses and making sure we all caught them, to ensure immunisation for the future. I nearly died of measles.) and several horrid ones for travelling abroad - typhoid, cholera etc. I always had a very, very violent reaction to vaccines - bedridden and sick for several days afterwards, or in the case of my BCG just a massive, weeping pus-filled crater which lasted for about a year and put an end to my swimming. I wasn't allowed to get it wet. But I was under the impression that my violent reaction to vaccines meant that I have a very strong and robust immune system. That's what I was told. It might be the case that the vaccine is not "live" - but it's still full of alien proteins (which some might call toxins. I'm just wary of using the word "toxin" because it gets misused so often in "complementary health stuff") which activate the immune system.