Program funded by the Gates Foundation in East Africa. The program involved the tetanus vaccine, a common and trusted public health tool. But what the women receiving those injections did not know was that a molecule identical to human chorionic gonadotropin had been integrated into the vaccine. hCG is essential for the maintenance of a healthy pregnancy. A woman produces it during pregnancy to protect the growing fetus. By injecting hCG into the mothers, the program was designed to trigger an immune response against the hormone, causing the women to abort their pregnancies or become unable to conceive in the first place.
Bill Gates is quoted as saying that population rates can be reduced through vaccination schedules.