Personally, I don't go for the flu vaccine. I'm too lazy to do the research and I just don't think it's that important.
My friend and I were talking about this today. I guess they're starting to require teachers and people who work directly with kids to keep updated on vaccines, and she works at the zoo with kids so she thinks they might start requiring it for them soon.
But seriously, the lack of understanding correlation =/= causation! Allergies are on the "rise" because of speshul snowflake PARENTS who over-diagnose. I have a long history with this particular brand of bullshit because I was a victim of this as a kid. I was "allergic" to corn syrup (among many many other things) because I became "hyperactive" when I ate it. When in reality I was diagnosed by a quack doctor and I was "hyper" because I was EXCITED whenever I was able to eat the stuff normal kids do. The other allergies had literally no basis other than my parents hyperanalyzing anything I did and listening to scam doctors.
I went to a nutrition/dietary supplement supply convention in the fall that specifically had a panel on this phenomenon. Marketers recognize that parents over-diagnose allergies, and want to start catering to their delusions. "Allergy-free" kid's food and medicine. It's really brilliant and I would not be surprised if this became fairly common, like gluten-free. I wish I had been able to go to the panel, but sadly it conflicted with something I actually had to go to for my job.
I don't know about the cancer and autism stuff as much. A lot of things end up with a ton of diagnoses all of a sudden just because they get added to and defined a certain way in the DSM, or become fads in psychology. So they "increase" because they are easier to recognize and diagnose, or excited psychologists want to diagnose it. I'm sure there is something weird in the modern world that's causing some of these problems, but vaccines of all things? People who come up with this stuff should be jailed for life, it's one thing to say microwaves cause cancer or whatever but this is horrifying.