Freeriding
Preference for taking advantage of herd immunity rather than taking the vaccine
Vaccination is not for me
Lifestyle, religion, good health or natural immunity would be enough to avoid disease
Cost-benefit analysis
Vaccinations are perceived as being riskier than the diseases themselves
Misperception of risk
Dismissal of the risk of getting the disease, considering its incidence to be irrelevant
Disease is not serious
Diseases are perceived as mild or even positive for child development and the immune system
Vaccination is unnecessary
General arguments portraying vaccination as unnecessary, redundant or unimportant
Trypanophobia
Arguments reflecting extreme fear of injections or hypodermic needles
Immune compromise
Fear that one’s immune system will be compromised or overwhelmed by vaccination
Contraindications
Rejection due to pre-existing conditions (e.g., allergies, pregnancy and young age)
Toxicity hazard
Vaccines contaminate the human body with toxins, heavy metals and viruses, or alter DNA