I was surprised at how many people don't know what a vaccine is made of. Not that it's a bad thing because that's why they work. It's facinating science but it's not flawless.
VACCINE
[ VAK-SEEN OR, ESPECIALLY BRITISH, VAK-SEEN, -SIN ]
NOUN
ANY PREPARATION USED AS A PREVENTIVE INOCULATION TO CONFER IMMUNITY AGAINST A SPECIFIC DISEASE, USUALLY EMPLOYING AN INNOCUOUS FORM OF THE DISEASE AGENT, AS KILLED OR WEAKENED BACTERIA OR VIRUSES, TO STIMULATE ANTIBODY PRODUCTION. APPARENTLY SOME PEOPLE DON'T UNDERSTAND WHAT A VACCINE ACTUALLY IS; INNOCUOUS FORM OF THE DISEASE