Mistrust of science
“Some opposition to vaccines comes directly from a mistrust of science, or mistrust of the government. Some people believe that pharmaceutical companies and scientists want to sell a product regardless of harmful consequences.
Others are skeptical of science that they don’t understand, or the chemicals they don’t know that go into vaccines. This distrust grows, as laws require children to be vaccinated in order to attend public schools.
Some parents prefer “natural” or homeopathic treatments instead. These treatments can aid in relieving the symptoms of some conditions, but are not as effective in preventing disease.
When people mistrust science, they’re less likely to vaccinate. They’re also less likely to trust the doctors who recommend vaccines.”
Source: www.healthline.com