Why people turn against vaccines

Old diseases are on the rise; old deadly, debilitating diseases that due to antibiotic resistance become harder and harder to treat; illnesses that with certainty will leave you either dead or crippled.
There is a weapon, but people choose not to use it despite its proven effectiveness: vaccines. Why are people turning against vaccinations and science? Is it miscommunication from scientists or are other underlying societal mechanisms at play? This is what I found after having talked to several vaccination-doubters where I live.