When it comes to the vaccine hesitant, they don't exactly make money from warning about vaccines, so it begs the question of whether this is actually their motive, because they actually get a lot of flack for discussing their fears and some people get pretty nasty with them. The fact is that many of those who vehemently warn about vaccines have had children who reacted badly to them. Sadly, we don't have much research going into figuring out why some people react so badly and what ingredients are likely to cause the reaction, so they can only latch onto what might have caused it. Calling them names or stupid, doesn't exactly help to convince them otherwise, especially if their child, themselves or someone they know have had a bad reaction. It doesn't matter how rare these reactions are, they are still very real and for the person they've happened to it's not going to feel very rare.

If we want to convince people of the benefit of vaccines then those vaccine injuries and deaths can't be just brushed aside, people need to see that they are being looked into and doctors need to be asking medical history questions of the family to guage their likelihood of reaction before vaccinating, because it does seem to be certain conditions that bring a higher risk.