Vaccine hesitancy

Vaccine hesitancy is not supporting vaccines and the spread of conspiracy theories against vaccines. Some believe that vaccines cause more harm than good.Others, specially parents of Children with allergy，believe that Kids are getting more vaccine than they actually needed. 
"Anti-vaccinationism" is about the opposition to vaccination; in more recent years, anti-vaccinationists have been known as "anti-vaxxers" or "anti-vax". Vaccine hesitancy is complex and context-specific, varying across time, place and vaccines. 
It can be caused by lack of proper scientifically-based knowledge and understanding about how vaccines are made or how vaccines work and psychological factors, including fear of needles or not trusting public figures and politicians. Some anti-vaxxers believe that vaccines cause autism, which is not true.
Vaccine hesitancy for infant is also associated with parents' health belief. Parents with higher education level typically showed less hesitancy for their Kids' vaccine decisions. On the other hand, Kids from poorly educated family or who believed to have allergies are more likely to be delay vaccinated by their parents. 
Religion also plays an important role in anti-vaccination. religious anti-vaccinationists would always refer vaccines as unnatural and therefore, unhealthy. Other anti-vaccinationists doubted about the necessity to those rare disease. It is ironic since the rarity of disease is a result of successful vaccination 
Finally, the contradictory of scientific evidence also confused public when making vaccine decisions. As the nature of scientific evidence encourages critical thinking and constructive supplements. It will make the public to struggle in believing the absolute of existing vaccine science.