An individual that has not taken the time to educate themselves on the Supreme Court case Bruesewitz v. Wyeth Inc.. According to the Supreme Court opinion in Smith ex rel. Smith v. Wyeth Labs., Inc., “unavoidably unsafe” things are products that “when given proper manufacture and labeling, no feasible alternative design would reduce the safety risks without compromising the product’s cost and utility.” Under this definition, cars, medications, household cleaners, forks and many more daily use items would be deemed “unavoidably unsafe.” It is given this qualification due to the individuals reaction, not the vaccine itself.
Anti-Vax individuals have also ignored or simply refused to believe the statistics given by the National Vaccine Injury Compensation Program, which state that of the 3,153,876,236 vaccines given from 01/01/2006 through 12/31/2016, only 3,597 cases presented due to vaccine injury were compensated, with 2,660 of those cases just being settlements, which means the injury was not necessarily caused by the vaccines, so about .000001141% of vaccinations cause injury. If that statistic was interpolated to the USA, with roughly a population of 324,000,000 people, and everyone were to receive vaccines, only ~370 people would be injured.

Anti-vax individuals also put immunosuppressed individuals at risk such as newborns, elderly, cancer patients or AIDS patients. So choosing not to vaccinate affects more than just their kids.