In July 2023, the ACOG released a Practice Advisory stating, “Based on data on the benefit of adjunct HPV vaccination, ACOG recommends adherence to the current Centers for Disease Control and Prevention (CDC) recommendations for vaccinations of individuals aged 9–26 years, and to consider adjuvant HPV vaccination for immunocompetent previously unvaccinated people aged 27–45 years who are undergoing treatment for CIN 2+”. The possible beneficial effect of peri-treatment HPV vaccination goes back to the early 2010s. But science is always changing, and MEDICINE MOVES FAST. In September 2025, the Lancet’s Obstetrics, Gynecology, and Women’s Health journal published the VACCIN trial to test that guidance. These authors found that, “Although previous studies, including meta-analyses and observational studies, have shown that adjuvant HPV vaccination reduces the recurrence of cervical dysplasia after surgical treatment, our trial suggests that adjuvant HPV vaccination is not effective in reducing the recurrence of CIN 2–3 lesions, contradicting the conclusions of previous works”. They have also called for a REVISION to prior guidance. This is FASCINATING. Listen in for details.

1. ACOG PA July 2023, “Adjuvant Human Papillomavirus Vaccination for Patients Undergoing Treatment for Cervical Intraepithelial Neoplasia 2+”

2. Adjuvant prophylactic human papillomavirus vaccination for prevention of recurrent high-grade cervical intraepithelial neoplasia lesions in women undergoing lesion surgical treatment (VACCIN): a multicentre, phase 4 randomised placebo-controlled trial in the Netherlands: https://www.sciencedirect.com/science/article/pii/S305050382500007X#:~:text=To%20our%20knowledge%2C%20this%20is,the%20conclusions%20of%20previous%20works.

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