The flu shot most clinics will want you to have this season is not on the shelf yet. The Ministry of Health and the Communicable Diseases Agency said on 4 September 2026 that the 2026-27 Northern Hemisphere vaccine should arrive in early to mid-October, about two weeks later than usual.
If you are 65 or older, under five, pregnant, or living with a condition that makes flu dangerous, that delay is the whole decision. Take a Southern Hemisphere dose now only if you want cover while you wait, then take the Northern Hemisphere dose at least eight weeks later.
What the flu vaccine actually is
Influenza is a respiratory virus. It shows up fast: fever, sore throat, cough, headache, and muscle aches. A cold is a different virus and a flu shot does nothing for it.
The shot is built against the strains experts expect to circulate. Immunity fades, and the strains change, so vaccine.gov.sg recommends a dose every year, or twice a year when both hemisphere formulations are in use. The vaccine does not contain a live virus that can give you influenza. A sore arm or a low fever for a day or two is your immune system responding, not the flu.
Children from 6 months through 8 years who have never had a flu vaccine need two doses, four weeks apart. One dose in that first year is an unfinished course.
Who Singapore actually prioritises
Anyone older than 6 months can have the vaccine. Subsidy, and the stronger nudge, follows the National Adult Immunisation Schedule and the National Childhood Immunisation Schedule.
The Communicable Diseases Agency's 1 September 2026 note asked higher-risk people to get vaccinated because influenza cases were up. The agency also said those infections were not more severe than usual. The groups it named:
- Adults 65 and older
- Children from 6 months to under 5 years
- People with chronic heart, lung, liver, kidney, metabolic, neurologic, or blood disorders, including asthma and diabetes
- People whose immunity is suppressed by illness or by medication
- Pregnant women, at any stage
- People on long-term aspirin who could develop Reye syndrome after flu
- Residents receiving intermediate or long-term care
Pregnant women are on that list because flu in pregnancy is a higher-risk illness, and the antibodies cross to the baby. That is a reason to book, not a reason to wait for a "safer" trimester. Confirm the product with the clinic if you have had a serious reaction to a flu vaccine before.
Southern Hemisphere now, or wait for October
Singapore sees flu all year, with heavier stretches around May to August and December to March. Those line up, roughly, with the southern and northern seasons.
The 2026-27 Northern Hemisphere vaccine has a two-strain change from the 2026 Southern Hemisphere vaccine, following World Health Organization recommendations. The Expert Committee on Immunisation says the Northern Hemisphere dose is the better match for the season ahead, and it is the dose they want recommended groups to receive.
The interim rule, from the 4 September 2026 MOH update, is simple:
- Have not had the 2026 Southern Hemisphere vaccine, and you can wait until mid-October: wait. Book the Northern Hemisphere dose.
- Have not had it, and you want some protection before stock arrives: take the Southern Hemisphere dose now. Still take the Northern Hemisphere dose later. Leave at least eight weeks between them.
- Already had the 2026 Southern Hemisphere dose: do not take another Southern Hemisphere dose. Wait eight weeks, then take the Northern Hemisphere dose as the next shot.
Polyclinics and CHAS GP clinics were told to reschedule patients whose appointments depended on the late stock. If nobody has called you, call them. Do not assume the appointment still stands.
Eight weeks is the minimum gap between a 2026 Southern Hemisphere dose and the 2026-27 Northern Hemisphere dose. A clinic that offers you both in the same month is not following the Expert Committee advice.
What a subsidised dose costs
These caps are for eligible Singapore citizens, from vaccine.gov.sg. If the GP reviews you and you do not meet the criteria, you pay the clinic's private price. Ask for that number before the injection.
| Who | Where | You pay |
|---|---|---|
| Healthier SG enrollee, 65+ or an adult with a listed condition | Your enrolled Healthier SG clinic | $0 |
| Singapore citizen, 65+, Pioneer Generation | CHAS GP | $9 cap |
| Singapore citizen, 65+, Merdeka Generation | CHAS GP | $18 cap |
| Singapore citizen, 18 to 64, with a listed condition, CHAS Blue or Orange | CHAS GP | $18 cap |
| Singapore citizen, 18 to 64, with a listed condition, CHAS Green or not on CHAS | CHAS GP | $35 cap |
| Singapore citizen, 6 months to under 5 | CHAS GP or polyclinic | $0 |
| Singapore citizen, 5 to 17, with a listed condition | CHAS GP or polyclinic | $0 |
Pioneer Generation means born on or before 31 December 1949 and a citizen on or before 31 December 1986. Merdeka Generation means born from 1 January 1950 to 31 December 1959, citizen by the same date, and the $18 cap applies from the 65th birthday.
The co-payment can go on MediSave if that clinic submits MediSave claims and you are allowed to use it. Permanent residents get the flu subsidy at polyclinics, not at CHAS GPs. PRs can still use MediSave at both, and polyclinic prices vary, so ask before you book.
If you are 65 or older and you are not Pioneer, Merdeka, or enrolled with a Healthier SG clinic, the public fee page does not publish a single cap for you. Get the quote from the CHAS clinic.
Where to book
Three places are taking appointments: participating CHAS GP clinics through vaccine.gov.sg/flu, polyclinics, and participating retail pharmacies for eligible adults 18 and older. Healthier SG enrollees should book the enrolled clinic. That is where the $0 dose lives.
A GP who does not participate in CHAS can still vaccinate you. You will not get these caps there.
When to skip this visit
Tell the clinic about previous vaccine reactions, allergies, and whether you are unwell today. A mild runny nose is usually fine. A fever is a reason to move the appointment.
Severe allergy to a previous flu vaccine, or to an ingredient such as certain antibiotics used in some products, is a reason to stop and ask which brand they are holding. Egg allergy used to send people to hospital for the shot. Many current products are safe in clinic for people who only get hives from egg. If your egg reaction was breathing trouble or collapse, say that before they open the syringe. The brand decides the next step, not a blanket rule from 2015.
The shot will not stop you catching flu. In a mismatched year it mainly cuts the chance of ending up in hospital. That is still the reason to take it if you are in a recommended group. It is a weak reason to pay private prices if you are a healthy adult who already had a dose this year.
People with mild flu symptoms should stay home until they resolve. If you have to go out, wear a mask and stay away from older people and anyone with a chronic illness. Worsening symptoms are a GP visit, not another vaccine appointment.
FAQ
Can I get the Southern Hemisphere and Northern Hemisphere vaccines in the same month?
No. The Expert Committee wants at least eight weeks between a 2026 Southern Hemisphere dose and the 2026-27 Northern Hemisphere dose.
Is the flu shot free for every Healthier SG patient?
No. The $0 dose at your enrolled clinic is for Singapore citizens who are 65 or older, or adults with the listed medical conditions. Other enrollees should ask the clinic what they will be charged.
Does a flu shot replace the childhood vaccines?
No. Influenza is one line on the National Childhood Immunisation Schedule. Measles, diphtheria, and the other NCIS doses are separate.
I already feel sick. Should I still go?
If you have a fever or you are clearly unwell, move the appointment. The vaccine is prevention. It is not treatment for the infection you already have.
Book the dose that matches the rule above, at a CHAS GP or your enrolled Healthier SG clinic. If the clinic cannot tell you whether they are holding Southern or Northern Hemisphere stock, that is the wrong day to roll up your sleeve.
