When the new Swine Flu strain found its way to Canada, United Kingdom, Spain, Israel, and New Zealand, the World Health Organization decided to raise its pandemic alert level to 4. … The new Swine Flu virus is said to be the combination of several influenza strains. The analysis of the new H1N1 influenza strain by the United States Center for Disease Control and Prevention found out that it is made out of one strain endemic in humans, two strains endemic in Eurasian and …
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Swine Flu - - A Basic Description | Health and Fitness Blog …