Vaccination Recommended Before Visiting Asia and the Indian Ocean Chikungunya Outbreaks

The Government of Hong Kong's Centre for Health Protection (CHP) of the Department of Health announced today that Hong Kong has recorded a total of 18 confirmed travel-related Chikungunya Fever (CF) cases this year.

The CHP data for September 17, 2025, indicates a substantial increase from 2016 to 2019, during which Hong Kong recorded between one and 11 imported cases annually.

Additionally, the Food and Environmental Hygiene Department continues to conduct vector investigations and targeted mosquito control operations. It intensifies mosquito prevention and control measures at the residences of recently confirmed patients, as well as at locations visited after the onset of symptoms.

The public should call 1823 in case of mosquito problems.

Furthermore, the CHP's Port Health Division continues to step up inspections at boundary control points, reminding cross-boundary public transport operators and other relevant parties to ensure good environmental hygiene and the practical implementation of anti-mosquito measures.

Currently, there are no travel restrictions when visiting Hong Kong, a popular tourist destination.

According to recent information from the Guangdong Provincial Disease Control and Prevention Administration, although the situation in Guangdong Province has been under control since late August 2025, with only sporadic new cases reported daily, Chikungunya outbreaks continue in many countries worldwide.

In Asia, India and Indonesia recorded more than 32,000 and 17,000 CF cases, respectively, in 2025. 

As of early 2025, the U.S. CDC maintains a Level 2 - Practice Enhanced Precautions, Travel Health Advisory, focused on Chikungunya outbreaks for countries in Asia and the Indian Ocean.

The CDC recommends vaccination for specific travelers visiting an area with a Chikungunya outbreak.

As of mid-September 2025, the UK states that, on an exceptional basis, vaccination can be considered for individuals aged 12 years and older. In these situations, further expert advice should be considered.

The final decision on vaccination rests with the health professional and the traveller after a detailed risk assessment has been performed.