Freeriding

Preference for taking advantage of herd immunity rather than taking the vaccine

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

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