As a child, my parents exposed my brother and me to neighbor's kids that had the "mumps" but neither of us ever got them. This was before the MMR vaccine was developed.
I did get both the Salk and Sabin polio vaccines as a child, but, other than a couple of tetanus vaccine shots for injuries, I have never had a "prophylactic" vaccine such as a flu shot. I have also never had the flu. I have no intention of getting this vaccine for a variety of reasons, including the growing number of reports of "incidents" that are causing harm to recipients.