Hong Kong Chikungunya Outbreak Closes Tsing Yi Nature Trails

The Centre for Health Protection (CHP) of the Department of Health in Hong Kong has announced that relevant departments will be conducting intensified mosquito control and prevention efforts along the Tsing Yi Nature Trails, a popular hiking area.

Published on December 9, 2025, this health alert is related to CHP's confirmation of a total of 78 chikungunya fever (CF) cases in 2025.

Among them, 10 were local cases, which were initially detected in late October 2025.

 On December 7, 2025, the CHP wrote that some confirmed CF cases had reportedly been bitten by mosquitoes while hiking along the Tsing Yi Nature Trails. These trails are situated in a countryside environment and cover a vast area, with the trails stretching approximately 7,000 metres. Along both sides of the trails, there are various natural breeding grounds for vectors, including puddles on soil surfaces and fallen leaves, which increase the risk of mosquito breeding.

This area is located east of Hong Kong Disneyland and northwest of the city of Hong Kong, which has welcomed over 40 million visitors this year.

The public should call 1823 in case of mosquito problems, stated the CHP.

Chikungunya is a mosquito-transmitted disease that is also vaccine-preventable.

As of December 12, 2025, chikungunya vaccines are offered at travel clinics in the United States and various countries.