Sunday, May 27, 2012

Influenza immunization (vaccine)

Table of Contents

Most people achieve protection from the flu approximately 2 weeks after receiving the vaccine.

RISKS AND SIDE EFFECTS

Most people have no side effects from the flu shot. Soreness at the injection site or minor aches and low grade fever may be present for several days.

Unlike the swine flu vaccine used in 1976, flu vaccines in recent years have shown no association with Guillain-Barre syndrome (GBS) in children, and an extremely small increase in the risk of GBS in adults. This risk is far outweighed by the number of severe flu cases prevented by immunization.

As is the case with any drug or vaccine, there is a rare possibility of allergic reaction.

The regular seasonal flu shot has been shown to be safe for pregnant women and their babies. Most people have no side effects from the flu shot. Soreness at the injection site or minor aches and low grade fever may be present for several days.

Normal side effects of the nasal spray flu vaccine include fever, headache, runny nose, vomiting, and some wheezing. Although these symptoms sound like symptoms of the flu, the side effects do not become a severe or life-threatening flu infection.

WHO SHOULD NOT RECEIVE A FLU VACCINE

Some people should not be vaccinated without first talking to their doctor. The vaccine is not approved for people under 6 months of age. In general, you should not get a flu shot if you:

  • Had a severe allergic reaction to chickens or egg protein
  • Have a fever or illness that is more than "just a cold"
  • Had a moderate to severe reaction after a previous flu vaccine
  • Developed Guillain-Barre syndrome within 6 weeks after receiving a flu vaccine

If you meet any of the above criteria, ask your doctor if a flu vaccine is safe for you.


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Review Date: 10/03/2010
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)