Every year the flu season turns into survival of the fittest for the various viruses that cause Influenza. Some die off. While others, like 2009's Influenza A (H1N1) Virus, become even stronger and more widespread. Researchers are constantly studying flu patterns in order to know which viruses will be most prevalent in the upcoming influenza season and how to protect against them. Once they determine which viruses will be most common they develop a new vaccination to target them specifically.
Last year's flu shot will not protect from the newest variations of the flu virus, which is why it is so important to get a flu shot every year. In this week's Health Front Marja Martinez explores which strains will be most common during the 2012-2013 Influenza season. !
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