Flu Shots 2025: What You Need to Know

As the 2025–2026 flu season approaches, health officials continue to recommend annual flu vaccinations for everyone aged six months and older, with few exceptions. Getting vaccinated early—preferably in September—is advised, as flu season typically starts in October and peaks in February.

Key Updates for 2025–2026

Vaccine Composition: This season’s flu vaccines are trivalent, meaning they protect against three different flu viruses: two influenza A viruses and one influenza B virus.
Thimerosal-Free Options: Single-dose flu vaccines that are free of thimerosal, a mercury-based preservative, are widely recommended for all individuals, including children and pregnant women.
Effectiveness: Flu vaccine effectiveness varies each year but typically prevents 40–60% of severe flu cases. Even if you get vaccinated later in the season, it can still provide meaningful protection, as flu activity can extend into April.

Options for Children

FluMist Nasal Spray: Available for children aged 2 to 49 who are not pregnant or immunocompromised, offering an alternative to the traditional flu shot.
Two-Dose Requirement: Children between 6 months and 8 years old who have never received a flu vaccine (or have only had one dose previously) will need two doses spaced at least one month apart.

Seniors and High-Risk Individuals

Older adults are at higher risk for severe flu complications. Special vaccines formulated for seniors, such as high-dose or adjuvanted vaccines, are available to boost immunity and help prevent serious illness.

Side Effects

Most people experience only mild side effects, such as a sore arm or low-grade fever. These reactions are normal and typically resolve within a day or two.

Cost and Accessibility

Health insurance generally covers the flu vaccine. Uninsured individuals may pay between $20 and $100. Local pharmacies and healthcare providers are good places to check for availability and pricing.

Looking Ahead

Researchers are investing heavily in developing a universal flu vaccine that could protect against multiple flu strains and potentially eliminate the need for annual flu shots.

Getting vaccinated remains the best way to prevent the flu and its potentially serious complications. Consulting with your healthcare provider is recommended to determine the best vaccination option for you and your family.