Why do people refuse to get vaccines for themselves and/or their children?

Some people believe that it is better to develop natural immunity by allowing children to contract vaccine-preventable diseases like measles; however, getting measles comes with the risk of death, deafness and intellectual disability. — TNS

All vaccines have side effects. Most of them are mild and will only cause you minor discomfort, if any at all.

Contrast this with getting the actual disease itself, such as Covid-19, measles, mumps, chickenpox, rubella or tuberculosis.