Vaccination can cause diseases
Herd immunity! Through comprehensive vaccination, one protects children who really cannot be vaccinated, e.g. because they are too young or sick.
Consequential damage due to vaccination
Prevention against many diseases
some vaccinations are unnecessary
The risk of developing secondary diseases is very low.
Injection is often unpleasant
The disease you would get without the injection is even more unpleasant than the injection itself.
The diseases that vaccination prevents are much worse than the mild fever that can occur after vaccination.
You do not know what is inside
Helps to eradicate diseases (e.g. smallpox!)
Side effects are exceptional and often minimal