Usually people are vaccinated against those long before they ever get cancer. There are people that are against vaccinations, as some do cause serious disease and even death in children. There has been a rise in the incidence of autism, febrile convulsions, narcolepsy, etc,. which some ascribe to vaccines, which can also compromise the immune system. Still, a one-time vaccination to protect against getting a potentially fatal disease is not quite in the same category as being prescribed drugs to take multiple times daily for who knows how long, perhaps till death do you part. Death, maybe even aided if not caused by a drug that was tested and passed as being safe.