Vaccines are under development for the control of fertility in males and females. This review discusses developments in anti-fertility vaccines at the National Institute of Immunology, New Delhi, India. A single injection procedure for the sterilization or castration of male animals depending on...
Tetanus vaccine may be laced with anti-fertility drug. International / developing countries - PubMed
Tetanus vaccine may be laced with anti-fertility drug. International / developing countries
Here are two older papers published regarding discussions about vaccines used for sterility.
COVID-19 Vaccine and Impact on Fertility Study - Full Text View.
This clinical trial ends in June regarding possible Covid vax effects on male sterility.