Saturday, 7 November 2009

Swine Flu Vaccine Side Effects...

Had my shot yesterday morning...and why the hell do I have to show almost ALL the listed side effects (except for the vomitting. Thank God for small miracles).... *sigh*

Local Side Effects from Approved H1N1 Vaccines

No deaths or serious adverse events have been reported from any swine flu vaccine. Approximately 44% of participants reported mild side effects within 7 days of receiving the first dose of CSL’s swine flu vaccine. 2.5% of vaccine recipients reported moderate local side effects, and there were no severe adverse events reported after immunization. 86% of the volunteers that received Novartis’s H1N1 vaccine reported adverse reactions after one or both doses – the most common local side effect experienced was injection site pain. The reactions were generally mild or moderate and resolved after 72 hours. Reported local adverse events, or side effects occurring at the location where either vaccine had been administered, include the following:

  • Tenderness
  • Pain
  • Redness
  • Hardening of skin
  • Swelling
  • Bruising

Common Systemic Side Effects from Swine Flu Vaccines

Systemic effects were also reported by CSL and Novartis vaccine recipients. Approximately 36% of volunteers that received the swine flu vaccine manufactured by CSL experienced mild systemic side effects. 8% of vaccine recipients reported moderate systemic side effects, and less than 1% experienced a severe adverse reaction to immunization. Severe side effects reported include, malaise, muscle pain, and nausea. Muscle aches were the most common systemic side effect reported by participants receiving the H1N1 vaccine produced by Novartis, and no severe systemic side effects were reported. The following are common whole-body side effects occurring in response to either H1N1 vaccination.

  • Headache
  • Malaise (feeling out-of-sorts)
  • Muscle pain
  • Chills
  • Nausea
  • Fever
  • Vomiting

In addition, researchers evaluated the occurrence of select adverse events including neurologic (e.g. Guillain-Barre syndrome), immune system or other serious reactions. According to the studies, none of the enrolled participants experienced these select events.

The National Institutes of Health (NIH) has also recently released preliminary safety information for an additional swine flu vaccine manufactured by Sanofi Pasteur Inc. Approximately 96% of healthy adults showed a robust immune response after receiving the vaccine. The only adverse events reported by trial participants were pain and redness at the injection site.

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