Remember that there's still belief in authority, as there are people going to refuse the HPV vaccine, it is a sign of being more careful about it, no matter how much the state tries to suppress it or ignore it. Since some doctors are ignoring severe cases and side effects, there's a lose in trust among this system. Unless they acknowledge the causes and confront it. There's pressure from the establishment that keeps many to ignore those side effects. But the good news is that there's a rise in physicians and doctors, according to some research about 15% of young doctors which is rising, starts to individualize parents, families, patients and children on vaccines, for instance delaying them, splitting the cocktails or even not taking some.
In the US, many of them are unnecessary. Compare the US to European nations, Iceland and Japan.