Hong Kong's Centre for Health Protection reported six community-acquired Legionnaires' disease cases from November 1 to November 7, involving five men and one woman aged between 60 and 80. All had underlying illnesses. The patients lived in Sha Tin (two), Tai Po, Sai Kung, Kwun Tong and North District.

The centre said initial investigations showed the cases were sporadic, with no epidemiological links established to other confirmed cases previously recorded in Hong Kong. Epidemiological investigations are continuing to identify potential sources of infection and high-risk exposure. As of November 7, 175 cases had been recorded this year, compared with 167 in 2025 and 135 in 2024.

The centre reminded the public to maintain properly designed man-made water systems and advised people with weakened immunity to avoid mist-generating devices or to use only sterile or cooled freshly boiled water in them. It noted that men, people over 50, smokers, people who consume alcohol heavily and those with weakened immunity are more susceptible, and that legionellae grow well in warm water between 20 and 45 degrees Celsius.