# Vaccination campaigns are covert sterilisation programmes: tetanus, polio and COVID-19 shots are secretly designed to make women infertile **Verdict: Contradicted.** The specific claim rated here is that vaccination campaigns have been used as a hidden means of sterilising women, whether through tetanus toxoid laced with a pregnancy hormone, polio drops spiked with anti-fertility agents, or COVID-19 vaccines that train the immune system to attack the placenta. Every version that has been tested has failed the test. Kenyan vaccine samples at the centre of the 2014 dispute were examined and the campaign was defended by WHO and UNICEF; the syncytin-1 argument was contradicted by immunologists and by the petition's own wording; and a prospective study of couples trying to conceive found no association between COVID-19 vaccination and the chance of pregnancy in either partner. There is a real research programme underneath the rumour, and this file sets it out honestly rather than pretending it away: contraceptive vaccines were genuinely developed and trialled, openly and under WHO's own imprint. What was never shown, in three decades of the claim recurring on four continents, is that any of that work was slipped into a routine immunisation campaign. This file rates that claim and nothing else. It takes no position on any individual medical question and offers no guidance. Category: Science, Space & Technology · Era: 1990s · First circulated: Early 1990s, in rumours documented by WHO in Mexico, Tanzania, Nicaragua and the Philippines; revived in northern Nigeria in 2003, in Kenya in October 2014, and in a new form against COVID-19 vaccines from December 2020 · Believed by: At various points, Catholic bishops and the Kenya Catholic Doctors Association in 2014, political and religious leaders in northern Nigeria in 2003, and a broad online anti-vaccine readership from 2020 onward; the specific factual claims have been examined and rejected by WHO, UNICEF, Kenya's health ministry, Snopes, FactCheck.org, PolitiFact and independent immunologists URL: https://theconspiratory.com/theory/vaccines-and-infertility ## Summary For more than thirty years, on four continents and against at least three different vaccines, the same accusation has kept returning: that an immunisation campaign aimed at women is really a sterilisation programme in disguise. WHO recorded the rumour in Mexico, Tanzania, Nicaragua and the Philippines in the early 1990s. It halted polio vaccination across northern Nigeria in 2003. Catholic bishops raised it against Kenya's tetanus campaign in October 2014. In December 2020 it reappeared in an entirely new vocabulary, aimed at mRNA COVID-19 vaccines and a placental protein called syncytin-1, and it is still generating fresh instances in 2026. The claim has a genuine kernel, and this file gives it room: contraceptive vaccines are a real field, a tetanus-based one was really trialled in the early 1990s, and WHO published on the subject under its own name. What has never been demonstrated is the step that matters, that any of this was ever put into a routine shot without telling anyone. Testing, official statements and a prospective fertility study all point the other way. This file rates the sterilisation claim, keeps the documented research record separate from it, and offers no medical advice. ## The claim That public health authorities, principally WHO and UNICEF, have covertly added anti-fertility agents to ordinary vaccines in order to sterilise women without their knowledge: beta-hCG in tetanus toxoid, anti-fertility hormones in oral polio vaccine, and, in the COVID-19 version, a spike protein engineered to make the immune system attack syncytin-1 and prevent the formation of a placenta. ## Origin and timeline - 1970s-1980s: Research into contraceptive vaccines gets under way in several countries. Professor G. P. Talwar, who founded India's National Institute of Immunology and served as its first director, develops a formulation combining a hormone blocker with tetanus toxoid as a carrier. FactCheck.org reports that Talwar chose tetanus because the disease so heavily affects women in childbirth, and that he attributes his own mother's death, eight days after he was born, to tetanus. - 1990s (early): Talwar's combination vaccine is trialled. It is designed to prevent pregnancy temporarily, not permanently. The trial finds the approach feasible but not good enough: only around 80 percent of women in the trial produced enough antibodies to prevent pregnancy. Talwar later says that efficacy above 90 percent is required and desirable, and that development went into low gear after he retired from the institute. - 1993: WHO publishes a report titled 'Fertility Regulating Vaccines' through its Human Reproduction Programme. The document remains on WHO's own institutional repository. Whatever else can be said about the field, it was not concealed: the organisation later accused of running a secret programme was publishing about the subject under its own name. - 1990s: Rumours spread in Mexico, Tanzania, Nicaragua and the Philippines that WHO and UNICEF are using women as guinea pigs to test a contraceptive vaccine disguised as tetanus toxoid. WHO responds that the rumours were apparently initiated by so-called pro-life groups, that they are completely untrue, that the vaccines contain no substance interfering with fertility or pregnancy, and that the false claims have had an adverse impact on immunisation programmes in all four countries. - 2003-2004: The claim takes a different vaccine. Leaders in Kano, Zamfara and Kaduna states halt the WHO and UNICEF oral polio campaign in northern Nigeria over allegations that the drops are laced with anti-fertility agents. Testing finds no such contaminants. The roughly year-long boycott is followed by a polio resurgence that reinfects previously polio-free countries. This site covers that episode in its own file. - 2014-10: A group of Catholic bishops in Kenya releases a statement objecting to a tetanus toxoid campaign aimed at women of childbearing age, saying they are not convinced the vaccine is free of a beta human chorionic gonadotropin subunit. Their statement cites the Philippines, Nicaragua and Mexico as precedent, which is to say it offers the 1990s rumour as the evidence for the 2014 one. - 2014-11: Dr Muhame Ngare of the Mercy Medical Centre in Nairobi says six samples sent to laboratories in South Africa tested positive for the hCG antigen. Dr Collins Tabu, head of immunisation at Kenya's health ministry, rejects the claim and notes that women immunised under the programme in recent years went on to conceive. On 9 November Snopes rates the sterilisation claim false. WHO and UNICEF issue a joint statement expressing deep concern about the misinformation circulating in the media on the quality of the tetanus toxoid vaccine in Kenya. - 2020-12-01: Wolfgang Wodarg and Michael Yeadon petition the European Medicines Agency over the Pfizer vaccine, raising syncytin-1, a protein essential to the formation of the placenta. The petition spreads online under the headline 'Head of Pfizer research: Covid vaccine is female sterilization'. PolitiFact reports on 10 December that Yeadon had not worked for Pfizer in nine years and that his LinkedIn profile describes him as a former chief scientific officer of allergy and respiratory research. - 2022-01: Boston University researchers publish a prospective study of couples trying to conceive, drawing on 2,126 women in the United States and Canada followed from December 2020 to September 2021. It finds no association between COVID-19 vaccination and fecundability, the chance of conception per cycle, in either the female or the male partner. It does find that COVID-19 infection in male partners may temporarily reduce fertility. - 2022-07: FactCheck.org examines a Children's Health Defense video reviving the tetanus claim and notes that research on a contraceptive vaccine resumed in 2006 with E. coli replacing tetanus as the carrier, so the more recent work does not involve tetanus at all, and that neither formulation has been produced or distributed for general use. It also notes that the video features some of the same people who made the claim in Kenya in 2014. - 2026-08: The fertility strand resurfaces in the United States around a disputed miscarriage statistic and a set of released Anthony Fauci text messages, drawing checks from Lead Stories, PolitiFact, Snopes and FactCheck.org within four days. This site tracks that episode in a separate file. ## The evidence, claim by claim - Claim: Tetanus vaccine given to women in Kenya was laced with beta-hCG in order to sterilise them. Evidence: Kenya's health ministry rejected the claim, its head of immunisation noting that women vaccinated in the programme had gone on to conceive. WHO and UNICEF issued a joint statement expressing deep concern at the misinformation about the vaccine's quality. Snopes examined the dispute in November 2014 and rated the sterilisation claim false. The bishops' own statement rested substantially on the earlier rumours in the Philippines, Nicaragua and Mexico, which WHO had already described as completely untrue and traced to campaigning groups rather than to any laboratory finding. - Claim: There is no such thing as a contraceptive vaccine, so raising the possibility is itself proof of a cover-up. Evidence: This one points the other way, and it deserves a straight reply: contraceptive vaccines are real. Professor G. P. Talwar of India's National Institute of Immunology developed one using tetanus toxoid as a carrier and trialled it in the early 1990s. WHO published a report on fertility regulating vaccines in 1993. The existence of the research is not in dispute and never has been. What the record does not contain is any instance of that work being introduced into a routine immunisation campaign without disclosure, which is the entire claim. - Claim: The tetanus-based contraceptive vaccine proves tetanus campaigns are the delivery mechanism. Evidence: Talwar's trial formulation was designed to prevent pregnancy temporarily rather than permanently, and it underperformed: only about 80 percent of participants generated enough antibodies, against a threshold Talwar put above 90 percent. Development slowed after he left the institute. When the work resumed in 2006, tetanus had been replaced by E. coli as the carrier, so the more recent research does not use tetanus at all. FactCheck.org reports that neither formulation has been produced or distributed for general use. - Claim: The COVID-19 spike protein resembles syncytin-1, so vaccination trains the body to attack the placenta and causes infertility. Evidence: Brent Stockwell, a Columbia University professor, told PolitiFact that any hint of similarity between the two proteins is extremely remote, that hardly any parts of them are even vaguely similar, and that they are far more distinct than cross-reactivity would require. He also pointed out the argument's own implication: if it held, women who caught COVID-19 would be rendered infertile by the infection itself, and no such effect has been observed. The petition that launched the claim conceded the gap in its own text, stating that there is no indication whether antibodies against SARS spike proteins would act like anti-syncytin-1 antibodies, before proceeding on the hypothetical. - Claim: The COVID-19 vaccines reduced people's ability to conceive. Evidence: Boston University researchers followed 2,126 women in the United States and Canada who were trying to conceive between December 2020 and September 2021 and measured fecundability, the probability of conception in a given cycle. They found no association with COVID-19 vaccination in either the female or the male partner. The one fertility effect the study did detect ran opposite to the claim: infection in male partners appeared to reduce fertility temporarily. - Claim: Campaigns target women of childbearing age, which gives the game away. Evidence: Maternal and neonatal tetanus is precisely a disease of childbirth, which is why the vaccine is offered to women who may give birth. UNICEF and WHO material cited by Snopes records 550 Kenyan infant deaths from neonatal tetanus in 2013 and around 58,000 worldwide in 2010, with a fatality rate that can reach 100 percent without hospital care. FactCheck.org reports that more than 80 percent of tetanus cases occur in mothers and their babies, and that a UNICEF partnership was followed by a fall of more than 40 percent in newborn deaths from the disease between 2010 and 2015. The targeting the claim treats as suspicious is the targeting the disease dictates. ## Why people believe it - The foundation is solid and anyone can check it, which makes the last step feel like a short one. Anyone who checks will find that contraceptive vaccines exist, that one used tetanus toxoid, and that WHO published on the subject. Everything up to the accusation checks out, and it is tempting to assume the last step does too. - Medical authorities have a genuine record of abusing populations who could not refuse. Tuskegee, the Guatemala syphilis experiments and Pfizer's 1996 Trovan trial in Kano are documented, not alleged. A person who knows that history is not being irrational in wanting proof rather than reassurance. - The claim is delivered by people with real standing: bishops, doctors, a scientist with a Pfizer connection, sitting senators. Trust in a messenger transfers to the message far more readily than most of us like to admit. - Fertility is the one thing almost nobody is willing to gamble with. A claim that attaches even a small perceived risk to something irreversible does not need to be probable to change behaviour, only possible. - Each revival arrives looking new. The 2014 version came with laboratory results, the 2020 version with a protein name and a petition to a regulator. Someone meeting it for the first time has no reason to recognise a rumour that has been circulating since before they were born. ## Open questions - Why has this particular accusation proved so much more durable than other vaccine rumours, surviving translation across at least four languages, three vaccines and thirty years? - The 2014 Kenyan laboratory results were asserted publicly and rejected by the health ministry and by WHO. What exactly the samples were and how they were handled has never been resolved to everyone's satisfaction, and that unresolved thread is part of why the episode still circulates. - Talwar's work was published, trialled and discussed openly for decades. Does open publication of sensitive research inoculate against conspiracy claims, or supply them with raw material? The record here supports both readings. - The claim now regenerates faster than any single fact-check can travel. Four fact-checkers covered the 2026 American version in four days, and the version they were checking had already changed shape between the first check and the last. ## Sources - Is Tetanus Vaccine Spiked with Sterilization Chemicals?, Snopes (2014): https://www.snopes.com/fact-check/tetanus-vaccine-sterilization/ - Statement from WHO and UNICEF on the Tetanus Vaccine in Kenya, World Health Organization, Regional Office for Africa (2014): https://www.afro.who.int/news/statement-who-and-unicef-tetanus-vaccine-kenya - Video Revives Old, Debunked Rumors About Tetanus Vaccines, FactCheck.org (2022): https://www.factcheck.org/2022/07/video-revives-old-debunked-rumors-about-tetanus-vaccines/ - Fertility Regulating Vaccines, World Health Organization, Human Reproduction Programme (1993): https://iris.who.int/bitstream/handle/10665/61301/WHO_HRP_WHO_93.1.pdf - No, Pfizer's head of research didn't say the COVID-19 vaccine will make women infertile, PolitiFact (2020): https://www.politifact.com/factchecks/2020/dec/10/blog-posting/no-pfizers-head-research-didnt-say-covid-19-vaccin/ - COVID-19 Vaccines Don't Cause Infertility, BU Research Shows, Boston University (2022): https://www.bu.edu/articles/2022/covid-vaccines-infertility/ - COVID-19 Vaccination Considerations for Obstetric-Gynecologic Care, American College of Obstetricians and Gynecologists (2026): https://www.acog.org/clinical/clinical-guidance/practice-advisory/articles/2020/12/covid-19-vaccination-considerations-for-obstetric-gynecologic-care - Republicans revive false miscarriage statistic, twist Fauci's texts about COVID-19 shots, FactCheck.org (2026): https://www.factcheck.org/2026/08/republicans-revive-false-miscarriage-statistic-twist-faucis-texts-about-covid-19-shots/ - Fauci didn't cover up data supposedly showing COVID-19 vaccine had 82% miscarriage rate, Snopes (2026): https://www.snopes.com/fact-check/fauci-covid-19-vaccine-miscarriages/ Rated by The Conspiratory, a neutral, sourced encyclopedia of conspiracy theories. Full page: https://theconspiratory.com/theory/vaccines-and-infertility