Hong Kong's Centre for Health Protection (CHP), part of the Department of Health, reported on August 10, 2026, that it had recorded seven community-acquired Legionnaires' disease cases between August 2 and 8. The patients were five men and two women aged 63 to 87, all with underlying illnesses, living across Southern, Tai Po, Sha Tin, Wong Tai Sin, Tuen Mun, Kwai Tsing and Sai Kung districts.

The CHP said initial investigation indicated the seven were sporadic cases, with no epidemiological links established to other previously confirmed cases in Hong Kong. Epidemiological investigations were under way to identify potential sources of infection and high-risk exposures. As of August 8, 114 cases had been recorded that year, compared with 167 in 2025 and 135 in 2024.

The department noted that men, people over 50, smokers, heavy drinkers and those with weakened immunity are more susceptible. It advised regular cleaning of taps and shower heads, quarterly draining and cleaning of building water tanks, and flushing infrequently used outlets, and issued specific guidance for immunocompromised people and for handling soil and compost.