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Published on: 9/23/2026

When should you get a flu shot if you are over 65?

Adults 65 and older should generally get a flu shot in September or October, ideally before the end of October, since flu activity typically rises in late fall and peaks between December and February. Timing matters more with age because protection can fade over several months, yet vaccinating too early may leave you less protected at the height of the season; if you miss October, getting vaccinated in November, December, or even later is still worthwhile. Seniors are also preferentially recommended to receive a higher-dose or adjuvanted flu vaccine, and coordination with COVID-19 or RSV vaccines, chronic conditions, and travel plans can shift the best date for you. There are several important factors to weigh, so see below to understand more before you book.

If you are unsure whether recent symptoms are flu, a cold, or something else that should delay or change your vaccine timing, a free, instant, online symptom check can help you make sense of what you are feeling in just a few minutes and point you toward the right next step, including whether to see a clinician first.

Last reviewed for medical accuracy: 09/23/2026

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Explanation

When Should You Get a Flu Shot if You Are Over 65?

Seasonal influenza (“the flu”) poses a higher risk to adults over 65. As we age, our immune systems weaken, making it harder to fight infections. Knowing when should you get a flu shot and which vaccine to choose can help ensure you’re as protected as possible.


Why Timing Matters

  • Immune response peak
    It takes about two weeks after vaccination for your body to build maximum protection.
  • Flu season window
    In most parts of the U.S., flu activity often starts in October, peaks between December and February, and can last as late as May.
  • Avoid waning immunity
    Protection can decrease over time. Getting vaccinated too early (e.g., July or early August) might mean reduced protection by late winter.

Ideal Timing for Adults Over 65

Health authorities like the Centers for Disease Control and Prevention (CDC) recommend:

  • Late September to early October
    Aim to get your flu shot by the end of October.
  • Don’t delay until the peak
    Waiting until December may leave you unprotected when flu activity surges.
  • Vaccinate throughout the season
    If you miss early fall, it’s still beneficial to get vaccinated through January or even later.

Special Considerations for Seniors

  1. Higher risk of complications
    • Pneumonia, hospitalization, and even death are more common in older adults.
    • Vaccination reduces these risks significantly.
  2. Vaccine effectiveness
    • Older adults may have a less robust immune response to standard-dose vaccines.
  3. Recommended vaccine types
    • High-dose flu vaccine (e.g., Fluzone High-Dose) contains four times the antigen of standard shots.
    • Adjuvanted flu vaccine (e.g., Fluad) includes an ingredient that boosts immune response.

Choosing the Right Vaccine

For those over 65, the CDC advises using one of the higher-dose or adjuvanted options:

  • High-Dose Quadrivalent
    Delivers a stronger immune stimulus against four flu virus strains.
  • Adjuvanted Quadrivalent
    Uses an adjuvant (MF59) to enhance immune response in older adults.
  • Standard-Dose Quadrivalent
    Acceptable if high-dose or adjuvanted vaccines aren’t available, but less preferred.

Speak to your healthcare provider about which vaccine option is best for you.


What If You Miss the Early Fall Window?

  • Still get vaccinated
    Flu viruses can circulate well into spring.
  • No need for a second dose
    Adults only need one flu shot per season, unless your doctor recommends otherwise.
  • Consider local flu activity
    If your community reports rising flu cases, act promptly.

Additional Steps to Protect Yourself

Vaccination is the cornerstone of flu prevention, but you can add layers of protection:

  • Hand hygiene
    Wash hands with soap and water for at least 20 seconds.
  • Avoid close contact
    Stay away from people who are visibly sick.
  • Cover coughs and sneezes
    Use a tissue or your elbow—never your hands.
  • Clean high-touch surfaces
    Disinfect door handles, light switches, phones, and remotes regularly.

What to Do If You Feel Unwell

Even with vaccination, you can still catch the flu or other respiratory infections. If you develop significant symptoms—high fever, difficulty breathing, chest pain, or confusion—seek medical attention immediately. For milder or early symptoms, you might start with a:

  • free, online symptom check, using the doctor approved Ubie Symptom Checker

This tool can help you decide whether to manage symptoms at home or contact a healthcare provider.


When to Speak to Your Doctor

Always consult a medical professional if you experience:

  • Severe or worsening symptoms
  • Symptoms that last more than a few days
  • Signs of complications (e.g., shortness of breath, chest pain, dehydration)
  • Any condition that concerns you or seems life threatening

Your doctor knows your health history and can offer personalized advice or prescribe antiviral medications if needed.


Key Takeaways

  • When should you get a flu shot? Ideally in late September or early October.
  • Over 65? Choose a high-dose or adjuvanted quadrivalent vaccine when possible.
  • Missed the window? Vaccinate anytime during flu season.
  • Stay vigilant with hygiene and symptom monitoring.
  • Seek help for serious symptoms and consider a free, online symptom check, using the doctor approved Ubie Symptom Checker as a first step.

Protecting yourself against the flu each year is crucial, especially if you’re over 65. Talk with your healthcare provider to plan the best timing and vaccine choice for your situation, and reach out promptly if you develop concerning symptoms. Always prioritize professional medical advice for any serious or life-threatening issues.

(References)

  • * Wallace C, Farrington E. Vaccines. Pediatr Nurs. 1991 Jul-Aug;17(4):372-4. PMID: 1861903.

  • * Pletz MW, Zanger P, Jilg W, Kern WV. [Vaccinations]. Dtsch Med Wochenschr. 2011 Oct;136(40):2011-5. doi: 10.1055/s-0031-1286382. Epub 2011 Sep 28. PMID: 21960329.

  • * Vaughn JA, Miller RA. Update on immunizations in adults. Am Fam Physician. 2011 Nov 1;84(9):1015-20. PMID: 22046942.

  • * Anselem O, Parat S, Théau A, Floret D, Tsatsaris V, Goffinet F, Launay O. [Vaccination and pregnancy]. Presse Med. 2014 Jun;43(6 Pt 1):715-21. doi: 10.1016/j.lpm.2014.04.003. Epub 2014 May 24. PMID: 24863661.

  • * Modin D, Jørgensen ME, Gislason G, Jensen JS, Køber L, Claggett B, Hegde SM, Solomon SD, Torp-Pedersen C, Biering-Sørensen T. Influenza Vaccine in Heart Failure. Circulation. 2019 Jan 29;139(5):575-586. doi: 10.1161/CIRCULATIONAHA.118.036788. PMID: 30586760.

  • * Hull B, Hendry A, Dey A, Beard F, Brotherton J, McIntyre P. Annual Immunisation Coverage Report 2016. Commun Dis Intell (2018). 2019 Sep 16;43. doi: 10.33321/cdi.2019.43.44. Epub 2019 Sep 16. PMID: 31522666.

  • * Saxena S, Skirrow H, Bedford H. Routine vaccination during covid-19 pandemic response. BMJ. 2020 Jun 16;369:m2392. doi: 10.1136/bmj.m2392. Epub 2020 Jun 16. PMID: 32546575.

  • * Kakoullis L, Steffen R, Osterhaus A, Goeijenbier M, Rao SR, Koiso S, Hyle EP, Ryan ET, LaRocque RC, Chen LH. Influenza: seasonality and travel-related considerations. J Travel Med. 2023 Sep 5;30(5). doi: 10.1093/jtm/taad102. PMID: 37535890; PMCID: PMC11758160.

  • * Olson SM, Sahni LC, Boom JA, Dawood FS, Muñoz FM, Ellington SR. Timing of influenza vaccination during pregnancy. Am J Obstet Gynecol MFM. 2024 Aug;6(8):101427. doi: 10.1016/j.ajogmf.2024.101427. Epub 2024 Jul 5. PMID: 38972548; PMCID: PMC11727063.

  • * Grohskopf LA, Ferdinands JM, Blanton LH, Broder KR, Loehr J. Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices - United States, 2024-25 Influenza Season. MMWR Recomm Rep. 2024 Aug 29;73(5):1-25. doi: 10.15585/mmwr.rr7305a1. Epub 2024 Aug 29. PMID: 39197095; PMCID: PMC11501009.

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