Hepatitis A Outbreak Among MSM Contained, Free Vaccination Ends September 12
HK01 · 1 SOURCESabout 2 hours ago4 MIN
Summary
Hong Kong's Centre for Health Protection announced that the hepatitis A transmission chain among men who have sex with men has been successfully broken. A free vaccination programme launched in March administered over 280 doses, helping reduce monthly cases from a January peak of 15 to just 2 in July. The free vaccination service will terminate on September 12, with the appointment platform closing a day earlier.
Key Points
- Between September 2025 and February 2026, Hong Kong recorded 24 hepatitis A cases sharing identical viral genetic sequences, affecting 22 men and 2 women
- Over 60 percent of patients identified as men who have sex with men, prompting the Centre to launch a targeted free two-dose vaccination programme on March 12
- By July 31, more than 280 men who have sex with men had completed vaccination, with cases plummeting from 15 in January to 5 in June and just 2 in July
- Genetic analysis confirmed no new matching sequences were detected after June, and all recent cases aged 21 to 83 showed no link to the original cluster
- The Scientific Committee on Vaccine Preventable Diseases recommends high-risk individuals, including men who have sex with men, consult doctors about自费接种 hepatitis A vaccination
Why It Matters
The successful containment demonstrates how rapid, targeted public health intervention can effectively interrupt infectious disease transmission within vulnerable communities. With hepatitis A capable of spreading through both contaminated food and high-risk sexual contact, continued vigilance and voluntary vaccination among at-risk populations remain essential to prevent future outbreaks in Hong Kong .
The successful containment demonstrates how rapid, targeted public health intervention can effectively interrupt infectious disease transmission within vulnerable communities. With hepatitis A capable of spreading through both contaminated food and high-risk sexual contact, continued vigilance and voluntary vaccination among at-risk populations remain essential to prevent future outbreaks in Hong Kong .