Singapore has seen a rise in influenza cases at the end of August and early September 2026, though cases remain no more severe than usual, according to health authorities [1, 2, 3]. The influenza positivity rate in community samples climbed to 36.6% during the week of August 16-22, up from 24% the prior week [3].

On September 1, the Communicable Diseases Agency (CDA) identified an increase in flu cases across the city-state [1]. Today, the Ministry of Health (MOH) and CDA jointly urged vulnerable groups—including seniors aged 65 and above, children between 6 months and under 5 years, and individuals with underlying medical conditions—to receive flu vaccinations promptly [1, 2, 3].

Health authorities also encourage those who have not yet received the 2026 Southern Hemisphere seasonal influenza vaccine to get it soon for interim protection [1, 2, 3]. While Southern Hemisphere vaccine supplies are currently adequate, some clinics report increased demand and occasional stock shortages [2]. People aged 18 and above with qualifying health conditions can access vaccinations at CHAS clinics, polyclinics, and participating retail pharmacies under the Community Pharmacist Vaccination Scheme [3].

The 2026-2027 Northern Hemisphere flu vaccine, which contains a two-strain update recommended by the World Health Organization (WHO), will be available in Singapore in early to mid-October 2026—about two weeks later than the usual late September availability [1, 2, 3]. The MOH and CDA stressed, "The 2026-2027 Northern Hemisphere seasonal influenza vaccine is expected to confer better protection against circulating influenza strains in the upcoming Northern Hemisphere season and is therefore the preferred vaccine for persons in the recommended groups" [2]. Those receiving the Southern Hemisphere vaccine now should still get the Northern Hemisphere vaccine when it arrives, with a recommended minimum interval of eight weeks between doses [1, 2, 3].

People with mild acute respiratory symptoms are advised to stay home until symptoms resolve, minimize social contact, and wear masks if they must go out [1, 3].

The next major update will come with the arrival of the Northern Hemisphere influenza vaccines in early to mid-October 2026, when health authorities will likely renew their vaccination outreach.