What are the Side Effects of Swine Flu Vaccine

By  ,  Onlymyhealth editorial team
Apr 13, 2011

Swine flu nasal spray vaccination, swine flu shot with thimerosal and swine flu shot without thimerosal are the three formulations of H1N1 influenza vaccination that are currently available. All the H1N1 vaccinations whether they are nasal spray or swine flu shots, are formed in the same manner as the seasonal flu vaccines. The Food and Drug Administration (FDA) don’t consider H1N1 vaccination to be a brand new vaccination, instead a strain change in the seasonal flu vaccine.


Mild Side Effects of Swine Flu Vaccine

According to the Centre for Disease Control and Prevention (CDC), in most of the cases the side effects of Swine flu vaccination are mild.

Nasal spray


Even though, the people who are concerned with the safety of using live virus don’t consider flu mist nasal spray a good vaccination for H1N1. The individual who must avoid flu mist vaccine include:

  • Children under two years of age.
  • Pregnant women.
  • Asthma patients.

Swine flu shot with and without Thimerosal


Swine flu injections are largely used to make people immune against H1N1. They contain an inactivate form of virus that is injected into the muscle. The Centre for Disease Control and Prevention recommends swine flu shots for general public. It must not be given to babies who are less than three months old.


Some of the side-effects of flu shots include headache, muscle ache, fever, nausea, redness and swelling on the region where the shot was given.


Thimerosal is a mercury based vaccine that is often doubted to increase the risk of autism in children. It is evident from various studies that there is no link between mercury content in vaccines and autism. Moreover FDA has approved the use of the H1N1 flu shot with thimerosal for preventing swine flu.

Severe side effects Swine Flu Vaccine

Even though severe side-effects of swine flu vaccination are rare, if they occur the effect will be evident within few minutes of the vaccine administration.

  • Severe allergic reactions.
  • Difficulty in breathing.
  • Wheezing.
  • Swelling in the face.
  • Weakness.
  • Rapid heart rate and dizziness in some cases.
  • Hardening of skin or dry skin patches.
  • Bruising.

The best way to get the vaccination for swine flu is to check with health department in your area. You must always consult your doctor before taking vaccination.


Read more articles on Swine Flu Causes and Risks

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