Influenza Positivity Rate Rises in Singapore

Influenza cases in Singapore have increased, with the positivity rate among influenza like illness samples in the community rising to 36.6 per cent for the week of August 16 to 22. The Communicable Diseases Agency (CDA) reported on September 1 that this figure is an increase from 24 per cent the previous week, although it remains below the January 2025 peak of 43.9 per cent. The CDA stated there is no indication that current infections are more severe than usual.

Seasonal influenza typically peaks in Singapore between May and August and between December and March. The CDA recommended that high risk groups, including seniors aged 65 and above, children aged six months to five years, and people with underlying medical conditions, receive an annual vaccination. Vaccinations are available at polyclinics, participating CHAS general practitioner clinics, and certain retail pharmacies.

Health officials urged individuals with mild respiratory symptoms to stay home until recovery. Those who must go out should wear a mask, avoid crowded places, and minimize social interactions. The Straits Times provided additional context from experts, noting that while some believe cases may drop as the peak season ends, others caution that it is unclear if positivity rates have peaked. Infectious diseases specialist Leong Hoe Nam noted that vaccines from April 2026 are effective against the current H3N2 strain and highlighted that vaccine effectiveness is generally lower in the elderly.