Those particularly at risk are the elderly and Advanced Immune System people with weak immune systems. Diabetes sufferers, those with kidney problems and heart disease sufferers are also high on the risk list. Many people die from flu each year; mostly from within the high risk groups.

So, what is the flu vaccine. The flu vaccine is usually prepared from chick embryos, which have been inoculated with a flu virus. Formaldehyde is used to deactivate the flu virus, which is then preserved with a mercury derivative called thimerosal.

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