As a biologist with a general understanding of vaccines and our immune systems’ interaction with them, I have been both amazed and troubled by the recent nonsense put out by the anti-vaccine “community” who have such false notions of vaccines— especially as concerns their safety and efficacy, which has led to a rise in so-called “vaccine hesitancy.”
As a child in the 1950s I contracted both the mumps and the measles since those vaccines were not available at that time. I survived both of these viruses relatively unscathed, but I remember feeling miserable as they ran their course. Having these diseases was my “vaccination” against both, and I have been immune to them ever since. I may have had “booster” exposures (without knowing it) to these diseases later on by being exposed to others who had those diseases.