Side Effects of This Vaccine

In 1976, a number of persons who received the “swine flu” influenza vaccine developed Guillain-Barré syndrome (GBS). Most of these persons were over 25 years of age. Although only 10 out of one million persons receiving the vaccine actually developed GBS, this number was 6 times more than would normally have been expected. Most of the persons who got GBS recovered completely from the paralysis it caused.

It is assumed that the “swine flu” virus included in the 1976 vaccine caused the problem, but this has not been proven. Since that time, the “swine flu” virus has not been used in influenza vaccines, and there has been no recurrence of GBS associated with influenza vaccinations.

Along with its needed effects, a vaccine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Get emergency help immediately if any of the following side effects occur:

Symptoms of allergic reaction

Difficulty in breathing or swallowing; hives; itching, especially of feet or hands; reddening of skin, especially around ears; swelling of eyes, face, or inside of nose; unusual tiredness or weakness (sudden and severe)

Other side effects may occur that usually do not need medical attention. These side effects generally do not last for more than 1 or 2 days. However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Headache (nasal mist); nasal congestion (nasal mist); runny nose (nasal mist); tenderness, redness, or hard lump at place of injection (“shot”)

Less common

Abdominal pain (nasal mist); aches or pains in muscles; cough (nasal mist); diarrhea (nasal mist); earache (nasal mist); fever ; or general feeling of discomfort or illness

pain or tenderness around eyes and cheekbones (nasal mist); redness or swelling in ear (nasal mist)

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.