Influenza A: vaccine side effects

Vaccines against influenza A (H1N1) would not cause long term side effects, the specialists say. The conclusion is based on the results of monitoring side effects of similar vaccines against seasonal influenza.

Vaccines against seasonal influenza are generally well tolerated. If they have side effects, it is mainly local reactions such as pain, redness, or swelling at the injection site. These effects may be followed by mild fever for 48 hours.

As for vaccines against influenza A (H1N1), some medics express doubts about the risks of side effects, such as Guillain-Barré syndrome.

Guillain-Barre syndrome may occur during a vaccination against influenza. It is a disease affecting the nerves, and can be serious, even if the recovery is complete in 85% of cases.

The risk of developing Guillain-Barré syndrome due to influenza would be yet much higher than the risk of occurrence of such a syndrome caused by a vaccination, according to the WHO.

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