The Centre for Health Protection (CHP) of Hong Kong's Department of Health on August 30 reminded schools and parents to take measures against communicable diseases as the new school year began. It said a letter had been sent through the Education Bureau to all schools. The CHP's Controller, Dr Edwin Tsui, noted that Hong Kong was still in influenza season and encouraged schools to join the 2026/27 Seasonal Influenza Vaccination School Outreach Programme, using the newly launched Electronic Consent Form via eHealth.

The CHP said Hong Kong entered the influenza season in late June and had recorded 11 cases of severe paediatric influenza infection so far, with eight patients discharged, two in critical condition and one fatal case. It expected influenza to remain active at the start of the school year, with outbreaks possible in schools. COVID-19 activity had risen since June and declined after a peak in early August, with two severe paediatric cases since June, neither child vaccinated against COVID-19.

The CHP also advised schools to eliminate stagnant water to prevent mosquito breeding. As of August 27, Hong Kong had recorded 28 dengue fever cases (26 imported and two local) and two imported chikungunya fever cases this year. It said hand, foot and mouth disease activity had declined since mid-August but sporadic outbreaks might occur after classes resumed.