> Quick view: MOH and the Communicable Diseases Agency confirmed on 4 September 2026 that flu is rising in Singapore, and that the 2026-2027 northern hemisphere flu vaccine will only reach clinics in early to mid October, about two weeks later than usual. Polyclinics and CHAS GP clinics are already contacting patients to reschedule booked flu jabs. If you are in a higher-risk group and unvaccinated, you can take the current southern hemisphere vaccine now, but you then have to wait at least eight weeks before the newer one.
Two announcements landed within four days of each other, and read together they change what a lot of Singapore households should do this month.
On 1 September the Communicable Diseases Agency said influenza cases are climbing. On 4 September the Ministry of Health said the vaccine most people should be waiting for is running late.
The numbers behind the flu increase
CDA's own surveillance figure is the one to hold on to. Among influenza-like-illness samples in the community, the positivity rate rose to 36.6 per cent in the week of 16 to 22 August 2026, up from 24.0 per cent the week before. That is a jump of more than half in seven days.
For context, CDA also gives the ceiling: the current level is still below last year's peak of 43.9 per cent, recorded in January 2025.
The agency was explicit on the point people worry about first. In its words, there is "no indication to suggest that the infections are more severe than usual". This is a volume story, not a severity story.
Flu in Singapore is not a once-a-year event. National surveillance shows seasonal influenza circulating all year, with higher activity typically from May to August and again from December to March, roughly tracking the southern and northern hemisphere winters.
The delay, and why it exists
Northern hemisphere flu vaccines normally reach Singapore by end-September, ahead of the NH season that runs October to March. This year they are expected in early to mid October 2026, which MOH puts at about two weeks later than usual.
The reason is not a Singapore supply problem. MOH describes an industry-wide delay in developing the 2026-2027 NH vaccines, which carry a two-strain change from the 2026 SH vaccines following World Health Organization recommendations. Two strains is a bigger reformulation than usual, and manufacturers worldwide have needed longer.
The practical consequence is stated plainly in the release: polyclinics and CHAS GP clinics will reach out to patients who have already booked flu vaccination appointments, to reschedule them. If you have a jab in the diary for late September, expect a call. MOH says patients who have not yet been contacted can expect to hear from their clinics soon.
What the Expert Committee on Immunisation actually recommends
This is the part worth reading carefully, because the answer is different depending on which of three situations you are in. MOH's Expert Committee on Immunisation set out an interim approach on 4 September.
| Your situation | What MOH advises |
|---|---|
| In a recommended group, not yet vaccinated, willing to wait | Wait for the 2026-2027 NH vaccine in early to mid October. It is the preferred vaccine, expected to give better protection against circulating strains |
| In a recommended group, not yet vaccinated, want cover now | Take the 2026 SH vaccine now, then still take the NH vaccine when it arrives, with a minimum eight-week gap between doses |
| Already had the 2026 SH vaccine | Wait for the NH vaccine and take it as your next dose, again with a minimum eight-week gap |
The eight-week interval is the detail that catches people out. If you take an SH dose this week, the earliest you could take the NH dose is around the start of November, which is a month after it becomes available. That is a real trade-off rather than a formality: cover now, or the better-matched vaccine sooner.
MOH is clear that supply of the current 2026 SH vaccine is sufficient, so taking it now is a genuine option and not a rationed one.
Who is in the recommended group
Both the CDA and MOH releases use the same three categories for people at higher risk of severe influenza:
- Seniors aged 65 and above
- Children aged six months to under five years
- Other vulnerable groups with underlying medical conditions
CDA's standing advice is that these groups receive influenza vaccination at least once a year.
If you are outside those groups and generally healthy, nothing in these two announcements is aimed at you. You can still be vaccinated, but the subsidy position is different, which is the next section.
What a flu jab costs, and the number most people get wrong
The influenza vaccine sits on Singapore's Subsidised Vaccine List under the National Adult Immunisation Schedule, so the price is capped rather than set by the clinic. These are MOH's published co-payment caps at CHAS and Healthier SG GP clinics, per dose, for the trivalent or quadrivalent influenza vaccine, applying to those aged 65 and above or aged 18 to 64 with certain medical conditions.
| Who you are | You pay, per dose |
|---|---|
| Healthier SG enrollee, at your enrolled Healthier SG clinic | $0 |
| Pioneer Generation cardholder | up to $9 |
| Merdeka Generation, CHAS Blue or CHAS Orange cardholder | up to $18 |
| CHAS Green or non-CHAS Singapore Citizen | up to $35 |
The $0 line is the one that goes unclaimed. Eligible Singapore Citizens enrolled in Healthier SG pay nothing for nationally recommended vaccinations at their enrolled clinic, and influenza is on that list. The single exception MOH names is the shingles vaccine (RHZV), where a capped payment still applies.
Two further points from MOH's scheme page:
- There is no application. No form, no registration for the subsidy itself. Eligibility follows from meeting the NAIS criteria.
- Enrolment in Healthier SG is open to eligible Singapore Citizens aged 40 and above, and it is what moves you from the $35 or $18 row to the $0 row.
At polyclinics and selected MOH-funded long-term care institutions, Singapore Citizens and Permanent Residents can also receive subsidies, with Pioneer Generation seniors getting a further 50 per cent off their subsidised bill and Merdeka Generation seniors a further 25 per cent. MediSave can be used for the out-of-pocket portion at both CHAS GP clinics and polyclinics.
Where to book
- CHAS GP clinics: book through vaccine.gov.sg/flu, the route both the MOH and CDA releases point to
- Polyclinics: book through your polyclinic cluster
- Retail pharmacies: eligible adults aged 18 and above may be vaccinated at participating pharmacies under MOH's Community Pharmacist Influenza Vaccination Sandbox
- Healthier SG enrollees: book at your enrolled clinic, which is also the only place the $0 rate applies
The haze overlaps with this, and it is a separate thing
Singapore is in an unhealthy-air stretch at the same time, with NEA issuing daily haze advisories since 4 September. It is worth being precise: haze and flu are unrelated causes with overlapping symptoms, and a flu vaccine does nothing about smoke exposure.
What they share is the same vulnerable group. Seniors, young children and people with chronic heart or lung conditions are the ones both advisories name. If you are calling an elderly parent about one, it is a reasonable moment to sort out the other.
What to do this week
- If you have a flu jab booked for late September, do not assume it stands. Wait for the clinic's call or check with them directly.
- If you are 65 or above, or have a chronic condition, and have never been enrolled in Healthier SG, that enrolment is what turns a $35 or $18 jab into a $0 one. It is worth doing before you book.
- If someone in the household is in a higher-risk group and unvaccinated, decide between cover now and the better-matched vaccine in October, remembering the eight-week gap that follows the earlier choice.
- If you have mild respiratory symptoms, MOH's advice is to stay home until they resolve, and if you must go out, to mask, avoid crowds and keep away from medically vulnerable people.
Fine print
- Every figure and recommendation here comes from the MOH press release "Update on Seasonal Influenza Vaccination" (4 September 2026), the CDA release "Update on influenza situation in Singapore" (1 September 2026), and MOH's Healthier SG Vaccinations subsidy page, last updated 28 August 2026.
- The co-payment table is subject to periodic revision by MOH. Confirm the current charge with your own clinic before you go.
- Vaccine arrival timing is an estimate that MOH itself attributes to current supply information from pharmaceutical companies. It can move again.
- This is a summary of official announcements, not medical advice. Whether a particular vaccine or timing is right for you is a question for your doctor, and eligibility questions should go to MOH or your clinic.
Related
- FairPrice Doubles Its CHAS Discount to 6% Until 1 January 2027
- Haze in Singapore: PSI Turns Unhealthy in September 2026
- Best Health Screening Packages in Singapore 2026
- Pioneer Generation MediSave Top-Up 2026
- Cost-of-Living Special Payment 2026: $400 to $600 From 9 September
Cover graphic: MissLobang. Figures: MOH and the Communicable Diseases Agency.
