Hong Kong's Centre for Health Protection (CHP) reported two Legionnaires' disease cases for the week of September 27 to October 3, 2026, according to a Department of Health statement published on October 5, 2026. One was a 67-year-old man living in Southern District with underlying illnesses, classified as a community-acquired case. The other was a 55-year-old woman with underlying illnesses who had travelled to the Chinese Mainland during the incubation period; hers was classified as an imported case.

The CHP said initial investigation found the cases to be sporadic, with no epidemiological links established to other previously confirmed cases in Hong Kong. As of October 3, 153 cases had been recorded in 2026, compared with 167 in 2025 and 135 in 2024.

The department advised the public to maintain man-made water systems properly and to clean, descale and disinfect tap and shower strainers regularly. It said people over 50, men, smokers, heavy drinkers and those with weakened immunity are more susceptible, and it urged the public to quit smoking and avoid alcohol.