CHP Continues to Follow Up on Cluster of Hepatitis A Infection Associated with Men Who Have Sex with Men

CHP continues to follow up on cluster of hepatitis A infection associated with men who have sex with men

The Centre for Health Protection (CHP) of the Department of Health today (April 10) announced that the number of new hepatitis A cases has decreased since last month's announcement of a cluster of hepatitis A infections involving men who have sex with men (MSM) and the provision of two doses of hepatitis A vaccine for MSM.

"Given the relatively long incubation period of hepatitis A infection, the transmission chain within a specific group may persist for several months to a year. To control the transmission chain, the CHP will continue to provide two doses of hepatitis A vaccine free of charge to MSM to safeguard public health. The CHP has launched an online booking platform today to help MSM with Hong Kong residency to book hepatitis A vaccinations at designated locations," the Controller of the CHP, Dr Edwin Tsui, said.

Latest data on hepatitis A infection

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The CHP recorded seven and eight cases of hepatitis A infection in February and March respectively, which are fewer than in January (15 cases). The CHP's epidemiological investigations showed that all eight cases recorded in March involved males, aged between 28 and 61. Two of them self-identified as MSM. The residential locations and restaurants patronised by these eight cases did not overlap with those of previous cases. Genetic analysis by the CHP revealed that the virus in three of the new hepatitis A cases harboured an identical genetic sequence to that of the cluster previously reported to be associated with MSM. As of March 31, this cluster involved a total of 27 cases (25 men and two women). Due to the long incubation period of hepatitis A, the CHP will continue to closely monitor the situation and take appropriate follow-up measures to interrupt the hepatitis A transmission chain within this group.

Hepatitis A vaccination

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"In light of the infection cluster among a specific group during the past six months, the CHP has offered an appointment service since March 12 to provide MSM with two doses of hepatitis A vaccine free of charge with the aim of controlling the transmission chain. In less than a month, over 60 people have made appointments for vaccination. The CHP urged MSM to book their vaccination as soon as possible through the newly launched online booking platform in order to protect their personal health," Dr Tsui said.

Hepatitis A virus is primarily transmitted through the ingestion of contaminated food or water, or contaminated hands before eating. The virus can also be transmitted through high-risk sexual contact. The incubation period of hepatitis A is usually 14 to 28 days, though it can last up to 50 days. Due to the long incubation period, symptoms such as fever, malaise, abdominal discomfort, loss of appetite, nausea, diarrhoea and jaundice may not appear until one to two months after infection.

Scientific literature indicates that, apart from foodborne transmission, hepatitis A outbreaks have occurred among MSM populations in many regions worldwide in the past. Due to the long incubation period, outbreaks transmitted through person-to-person contact tend to persist longer. Between 2015 and 2017, Hong Kong also experienced hepatitis A transmission chains involving MSM, which were successfully interrupted by vaccinating the affected groups at risk. According to the Scientific Committee on Vaccine Preventable Diseases under the CHP, individuals in high-risk groups (including MSM) should consult their doctors about receiving hepatitis A vaccination to protect their personal health.

Dr Tsui said that the CHP will continue to monitor and investigate hepatitis A infection cases, and cautiously consider the epidemiological situation and transmission risks when determining the duration of the ad hoc vaccination service, in order to provide comprehensive protection for public health. He also reminded doctors to remain vigilant about hepatitis A cases and to provide relevant recommendations on hepatitis A vaccination to high-risk groups.

The CHP will continue, through its Red Ribbon Centre and in collaboration with non-governmental organisations, to raise awareness and provide education on hepatitis A prevention to MSM, and to encourage them to receive timely vaccinations.

For more information on hepatitis A, please visit the CHP's website.

The Centre for Health Protection (CHP), Photo source: reference image

AMS open day promotes National Security Education Day

To promote the National Security Education Day, the Auxiliary Medical Service (AMS) held an open day at its headquarters in Ho Man Tin today (April 19). The event aimed to enable members of the public to learn about the work of the AMS in safeguarding national security, to enhance public awareness of national security, and to further deepen their understanding of the daily operations and services provided by the AMS.

Addressing the opening ceremony, the Secretary for Financial Services and the Treasury, Mr Christopher Hui, said that safeguarding national security is the common responsibility of all. National security is not confined to single area; it is closely linked to finance, public health, and everyday community life. Among the 20 major fields of national security, biosecurity is closely related to the work of the AMS. The AMS provides various services to the public, including non-emergency ambulance transfer services, first aid coverage during large-scale public events, as well as duty at country parks and cycling tracks. The AMS spares no effort in safeguarding the safety and health of the general public. He would like to express his heartfelt gratitude to the members of the AMS for their unwavering dedication and commitment to protecting the public.

The Commissioner of the AMS, Dr Ronald Lam, said that this year marks the beginning of the country's 15th Five-Year Plan, and the theme of this year's National Security Education Day is "Proactively Align with the 15th Five-Year PlanFollow a Holistic Approach to Development and Security". The AMS has been strengthening members' and cadet corps' understanding of national security through various channels. In the past year, the AMS organised the "Together, We Set a New Record" event, setting a Guinness World Record for "Most pairs of people applying arm slings simultaneously", to promote the importance of first aid knowledge to the public. He expressed gratitude to all sectors for their support to the AMS, and added that the AMS will spare no effort in safeguarding national security and contribute to building a healthy and safe Hong Kong.

The open day featured a variety of engaging activities, including national security-themed game booths, first aid demonstrations, band foot drills, medical and health seminars, health screenings, as well as displays of ambulances and first aid bicycles. Through these activities, members of the public could gain a deeper understanding of the daily work of the AMS, access more health information, learn about developments in the healthcare sector, and at the same time enhance their awareness of national security.

AMS open day promotes National Security Education Day Source: HKSAR Government Press Releases

AMS open day promotes National Security Education Day Source: HKSAR Government Press Releases

AMS open day promotes National Security Education Day Source: HKSAR Government Press Releases

AMS open day promotes National Security Education Day Source: HKSAR Government Press Releases

AMS open day promotes National Security Education Day Source: HKSAR Government Press Releases

AMS open day promotes National Security Education Day Source: HKSAR Government Press Releases