It's interesting - when I went to school in the 1970's there were was 1 inoculation and then 2 boosters at various times - but the inoculations were much lower in volume:
1970's
Polio vaccination
Combined vaccination for Tetanus, Diphtheria, and Pertussis (DTP vaccine)
Combined vaccination for Measles, Mumps, and Rubella (MMR vaccine)
Smallpox
Today
Hepatitis B
Rotavirus
Diphtheria, Tetanus, and Pertussis (combined DTaP vaccine)
Hib (Haemophilus influenzae type b)
Pneumococcal
Polio (inactivated vaccine)
Influenza (yearly)
Measles, Mumps, and Rubella (combined MMR vaccine)
Varicella (chickenpox)
Hepatitis A
Meningococcal (certain high-risk groups only)
Granted - technology marches on, lessons learned and all that - but I gotta tell ya, that's a lot of **** right there to get inoculated for as a K-12 kid. I don't have kids so I have no horse in this race but that may make me a little more non-biased than most and I can see why people may be a little hesitant. That said, when I went into the Army I got a shot that pretty much killed any chance of me catching anything for like 8 years. I didn't even get a cold or atheletes foot, according to what I found this is what I was given:
Army
Adenovirus, Types 4 and 7
Influenza
Measles
Menigococcal
Mumps
Polio
Rubella
Tetanus-diptheria
Yellow Fever
Now that Army inoculation looks more like what kids are getting today. But really, I have no idea what they shot me with and when I went overseas I got boosters and other shots as well. :shrug: