Well, how do you think HCG would "accidentally" get into a batch of tetanus vaccines? You can only get it from a lab that filtered it from a pregnant woman's blood or urine.
It's possible to get false positives using the testing methods they used, and that may be what occurred. Plausible deniability.
The Kenyan tetanus vaccine schedule, the number of boosters, is unlike the schedule we use in the U.S. I find that most interesting. The reasons I've seen given for the multiple boosters spaced so close together by the Kenyans would cause a reasonable person to doubt the effectiveness of the U.S. tetanus vaccine. Here is what
UNICEF claims in an interview about the controversy:
C-Fam: Why does the Tetanus vaccine require 5 doses, when usually tetanus vaccination only requires one shot every 5 to 10 years?
Elder: During vaccination campaigns that aim to protect newborns living in areas with limited access to health facilities, 3 doses are administered. The second dose after 1 month or soon thereafter and the third dose after 6 months. The 3 doses provide protection for 5 years. These are additional doses as most people have received some TT vaccine when they cut themselves or during visits to Antenatal clinics when pregnant. Five doses are recommended in the Kenya Vaccination policy to anyone (male or female) as it offers protection against tetanus for life.
Notice he didn't answer the question; but he did bring more questions to my mind, particularly about the differences between U.S. tetanus vaccination policy and Kenyan tetanus vaccination policy. Protection against tetanus for life? No way. He's either lying or just ignorant.