They made us get the Swine Flu shot in Air Force boot camp at Lackland in early October of 1976. I got sick enough that I almost collapsed on the PT field and was in the infirmary for almost a week. I almost missed my last week of BMT because of it.
In the USAF in January 1974 I was vaccinated with an experimental adenovirus vaccine that was used on 1000 recruits. They stopped because they found out the vaccine had a cancer gene within the vaccine. I learned of this six years later in an advanced virology class from a professor that was part of the vaccine testing group.