Related Experiment Video
Updated: Dec 9, 2025

Humanized NOG Mice for Intravaginal HIV Exposure and Treatment of HIV Infection
Published on: January 31, 2020
Evaluation of a Text Messaging-Based Human Papillomavirus Vaccination Intervention for Young Sexual Minority Men:
Mary A Gerend1,2,3, Krystal Madkins2,3, Shariell Crosby2,3
1Department of Behavioral Sciences and Social Medicine, College of Medicine, Florida State University, Tallahassee, FL, USA.
Background:
Men who have sex with men (MSM) are at high risk for human papillomavirus (HPV) infection and HPV-related anal cancer. Although a safe and effective vaccine is available to prevent HPV infection, HPV vaccine uptake among young MSM remains low.
Purpose:
This pilot randomized controlled trial tested the acceptability, feasibility, and preliminary efficacy of a text messaging-based HPV vaccination intervention for young sexual minority men.
Methods:
In 2018, unvaccinated sexual minority men aged 18-25 years were recruited from Chicago to participate in a 9 month sexual health program called txt2protect. Participants (N = 150) were randomized to the intervention or control condition. Intervention condition messages focused primarily on HPV vaccination, with only a brief mention of other sexual health practices (e.g., condom use and HIV testing), while control condition messages focused on a variety of sexual health practices with only a brief mention of HPV vaccination. Participants received daily text messages for the first 3 weeks and monthly text messages for the remaining ~8 months of the trial. Participants completed surveys at baseline and 3 week and 9 month follow-ups.
Results:
Participants reported high satisfaction with the intervention. Although trial retention was high (with over 88% completing the 9 month survey), the study fell short of meeting its recruitment goal. HPV vaccine series initiation was significantly higher among intervention participants (19.4%) compared to control participants (6.6%), odds ratio = 3.43, 95% confidence interval: 1.17, 10.08.
Conclusions:
Findings suggest that txt2protect is an acceptable and potentially promising intervention for increasing HPV vaccine initiation among young sexual minority men.
Clinical Trial Registration:
NCT02994108.

