Baby boomers were subject to frequent injections during large public health campaigns such as the polio and small pox mass inoculations. Also it was very customary in the late 1940’s thru the mid 1960’s that whenever they became ill and their parents brought them to a GP or a pediatrician they inevitable received a “shot”. There was no disposable equipment in those days. After it was “sterilized” it was reused. Suffice it to say some doctors sterilized better than others. A lot of “dirty needles” were used. Good idea for boomers to be tested for Hepatitis C. Untreated it is a very bad actor. It can be treated and even cured.
My mom got HepC from a contaminated transfusion after some surgery in 1976. She died from it 35 years later.
My best friend died from cirrosis from Hep C. Never a drug user and married since she was 19. They figured she got it from a needle prick when she worked as a nurses aid at a hospital. Before the days of disposables, etc.
When my sister and I received shots (early 50s?)the same needle was used, no sterilization.
As a Boomer I remember every visit to the doctor ended with a shot. I knew bad things were going to happen when he walked over to the autoclave and pulled out a glass syringe. I didn’t take shots well back in the day.