Immunization

I wonder what makes these people think that we don't have immunization. We never could have gotten a passport and visa without having gotten our shots. Surely my own mother would remember who the doctor was or something about where we got our smallpox vaccination and other shots, maybe tetanus and whatever else was required at the time that we left the country. It was scary, getting my shots, but the benefit is that I cannot get that sick ever. My body just won't take the virus.