In a new report, a panel of scientists assembled by the Institute of Medicine reviewed the risks of some of the most common vaccines. The panel found no evidence that a popular vaccine causes autism, a subject that has ignited debate for years. But it did find that the chickenpox vaccine carries some potential for side effects that can crop up years after the shot is administered.
People who have had the vaccine can develop pneumonia, meningitis or hepatitis years later if the virus used in the vaccine reawakens because an unrelated health problem, like cancer, has compromised their immune systems.
The same problems are far more likely in patients who are infected naturally at some point in their lives with chickenpox, since varicella zoster, the virus that causes chickenpox, can live dormant in nerve cells for decades. Shingles, a painful eruption of skin blisters that usually affects the aged, is generally caused by this Lazarus-like ability of varicella zoster.
The report is notable because it represents the most comprehensive review of the medical literature on the subject to date. For more, view the full report, ?Vaccine Cleared Again as Autism Culprit,? and then please join the discussion below.
Source: http://well.blogs.nytimes.com/2011/08/26/looking-at-the-risks-of-vaccines/
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