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Frequently Asked Questions About the Seasonal Flu Vaccine


  1. Who should get the influenza vaccine?
    The influenza vaccine is recommended for everyone 6 months of age and older.

  2. How long does it take for the vaccine to protect me and how long does it last?
    It takes up to 2 weeks for protection to develop from the seasonal vaccine, and lasts for about a year.

  3. What is the difference between the nasal vaccine and the injectable vaccine?
    The nasal influenza vaccine (LAIV) contains live but weakened influenza virus. It is sprayed into the nostrils and is preservative free.
    The injectable vaccine is inactivated (killed) vaccine that is given by injection into the muscle. Some presentations of this vaccine may contain a preservative.

  4. Who should get the nasal vaccine?
    The nasal vaccine is recommended for healthy people 2 years through 49 years who are not pregnant. It should not be given to someone with an egg allergy, persons less than 2 years old or persons older than 49, children with asthma or recurrent wheezing, or persons with long term health problems such as heart, lung, kidney or liver disease, metabolic or blood disorders, children and adolescents on long-term aspirin therapy and anyone one with a weakened immune system or in close contact with someone who’s immune system is so weak they require care in a protected environment.

  5. Who should get the injectable vaccine?
    The injectable vaccine is approved for all persons 6 months and older. Persons with a severe egg allergy should not receive the injectable flu vaccine. Tell your child’s doctor if your child has any severe life threatening allergies, has had a severe reaction after a dose of influenza vaccine, or a history of Guillain-Barre Syndrome.

  6. When should we get the injectable vaccine?
    Influenza can occur at any time, but most cases occur November through May. Recently, most infections have occurred in January and February. In most cases, getting vaccinated in December, or even later, will still be beneficial. If your child needs 2 doses of the seasonal vaccine, begin the process early so they are protected before the influenza starts circulating in your community.

  7. How many doses does my child have to get?
    Children under 9 years of age who have never received an influenza vaccine require 2 doses. If a child under 9 years of age was immunized for the first time last season and only received one dose, he/she requires two doses this season. There needs to be 4 weeks in between the first and second dose.

  8. If my child got the H1N1 influenza vaccine or had influenza during the pandemic last year, do they need to be vaccinated this year for influenza?
    Yes. Even though this year’s seasonal influenza vaccine contains the H1N1 strain that caused the 2009 pandemic, getting the current vaccine is still a benefit because two additional strains of influenza that may cause disease are contained in the vaccine, and your child’s immunity will be boosted.

  9. Why does my child have to get the influenza vaccine every year?
    The influenza vaccine is given every year because the strains of influenza viruses that circulate each year are different. Influenza is unique in its ability to change and these changes mean that people naturally infected or immunized one year might not be protected the next year.

 


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