The common comeback for vaccine injuries/death is," Well we really don't KNOW if they vaccine was the cause." That is why the NVICP is such a joke,because most times parents can NOT prove the vaccine caused harm.
My mom had diphtheria in her 20's.Assuming she had a DT in childhood,but who knows in her country in the 1940's-50's. I would think she would push for that vaccine,but she actually abvocates for the tetanus vaccine due to the death of a woman she knew who got blood poisoning after a scrape on her knee at 41.I was fuming over her recent tet booster(to dh) who then backed HER up,"Well you gotta have a tetanus vaccine if you get a cut!" Oy,old conditioning dies hard