Flu Vaccine 2026–2027: When Should Children Get It?
When to arrange a child’s flu vaccination, who needs a second administration and what to consider after illness: a guide to common questions for the 2026–2027 season.
The flu vaccine for children is recommended from 6 months of age for the 2026–2027 season unless there is a contraindication. September and October are suitable for most children. Some children younger than 9 need two administrations at least 4 weeks apart, depending on their vaccination history. Vaccination reduces the risk of severe influenza and its complications.
Influenza is an acute viral infection that can cause high fever, marked weakness, headache, muscle pain and cough. Complications can include pneumonia, ear infections and worsening of chronic conditions.
Who should receive the flu vaccine?
The American Academy of Pediatrics recommends annual influenza vaccination for children from 6 months of age unless there is a contraindication. Vaccination is particularly important for children at higher risk of severe illness, including:
- Children younger than 5, especially those younger than 2.
- Children with asthma or other chronic lung conditions.
- Children with heart conditions.
- Children with neurological conditions.
- Children with diabetes or other metabolic conditions.
- Children with immunodeficiency or receiving immunosuppressive treatment.
- Children with other chronic conditions that increase the risk of complications.
Vaccination is also important for family members and others who regularly have contact with infants or children in higher-risk groups.
When is the right time to vaccinate?
Vaccination is ideally completed before influenza viruses begin circulating widely. September and October are recommended for most children, with completion by the end of October where possible. Children who need two administrations should start earlier.
Missing October does not mean it is too late. Vaccination can remain useful throughout the season while influenza viruses continue to circulate.
When does a child need a second administration?
Some children aged 6 months through 8 years need two administrations of influenza vaccine. Two, at least 4 weeks apart, are needed if the child has not previously received influenza vaccine on at least two occasions, or if their vaccination history is unknown.
If the required previous vaccinations have already been received, one administration is usually sufficient for the current season. Children aged 9 and older generally need one influenza vaccination each year.
Why is vaccination needed every year?
Immune protection after vaccination declines over time, and influenza viruses continually change. Vaccine composition is therefore reviewed regularly to reflect the viruses expected to circulate. Last year's vaccination does not replace vaccination for the 2026–2027 season.
Can a vaccinated child still get influenza?
A vaccinated child can still get influenza because no vaccine provides complete protection against infection. Vaccination reduces the likelihood of severe illness, hospitalization and associated complications. An inactivated influenza vaccine cannot cause influenza. Brief reactions can occur after vaccination, including soreness or redness at the administration site, a mild temperature, weakness or feeling unwell.
Vaccination after illness: when can a child have it?
A mild runny nose or slight cough without a significant effect on general health is usually not, by itself, a reason to postpone vaccination. During a moderate or severe acute illness, especially with a high temperature, vaccination is generally deferred until the child improves. The decision follows an individual assessment.
Can the flu vaccine be given with other vaccines?
Influenza vaccination can usually take place at the same visit as other vaccines recommended for the child’s age. The doctor considers the child’s vaccination schedule.
When is influenza vaccination contraindicated?
A previous severe allergic reaction to the vaccine or one of its components is a key reason to discuss contraindications with the doctor. Egg allergy is generally not a reason to avoid influenza vaccination under current recommendations. If a child previously had a serious reaction after vaccination or has a complex chronic condition, the decision should be discussed with the treating doctor.
What should parents remember for 2026–2027?
Influenza vaccination is recommended for children from 6 months of age in the absence of contraindications. September and October are suitable for most children, but vaccination can still be worthwhile later in the season.
For children younger than 9, checking previous influenza vaccination records is particularly important: some need two administrations at least 4 weeks apart. Annual vaccination is primarily a way to reduce severe illness and complications.
Sources
American Academy of Pediatrics: influenza prevention recommendations for 2026–2027. World Health Organization: recommended vaccine composition for the 2026–2027 Northern Hemisphere influenza season.
If a consultation outside the clinic is needed, see the arrangements for a doctor house call. For further reading on everyday health, explore what can disrupt a full night’s sleep.
Author: Dr. Saltanat Kopeeva — General Practitioner, Pediatrician.