The CDC childhood vaccine schedule went from ten vaccines, plus boosters in 1986 to well over fifty vaccines today. I was born in 1978, I have one brother who's 13 younger than me, another who's five years young. Our parents got us vaccinated according the 1986 vaccine schedule and we're healthy. I don't deny the science is evolving but I can also sympathize with parents who want to space out the vaccines for their kids.