Hong Kong's Centre for Health Protection reported on October 23, 2026, that the city had recorded 36 dengue fever cases so far that year, of which 34 were imported and two local. In the week from October 16 to October 22, two imported cases were recorded; the patients had visited India and Bangladesh during the incubation period. By comparison, 59 dengue cases were recorded in 2025, all imported, and 161 in 2024, including five local cases.

The centre also reported seven confirmed chikungunya cases in Hong Kong so far that year, six imported and one local, with no new cases in the October 16 to 22 period. It said 82 confirmed cases were recorded in 2025, 11 of them local. Citing the World Health Organization, the centre said about 2.5 million dengue cases and over 1,500 related deaths were recorded globally from January to September 2026. It said Guangdong Province had recorded 586 dengue cases and 1,753 chikungunya cases this year as of September.

The centre reminded the public to prevent mosquito bites and breeding at home and when travelling, to check conditions at destinations, and to use repellents according to label instructions. The Food and Environmental Hygiene Department advised removing standing water and scrubbing drains weekly.