Swine Flu Outbreak

In Mexico in April this year, a never-before heard strain of swine flu emerge, turning ill more than a thousand Mexicans and causing the death of 68. Swine flu has spread to other parts of the world such as the US and New Zealand when affected individuals (Mexicans or tourists to Mexico), traveled to those places. Swine flu has spread so far and wide that the World Health Organization fears it will bring about the next pandemic.This is not the first time the world is threatened by swine flu. Swine flu, which is also referred to as pigfluenza, hog flu, pig flu, or swine influenza, typically affects pigs only. In 1918, an H1N1 virus caused flu pandemic in humans. Scientists speculated that H1N1 was created either when human influenza virus crossed specie boundary and affected pigs, or the other way around.In 1930, a study confirmed that influenza virus caused the illnesses of pigs; the viral strain was identified as H1N1. Other past outbreaks in humans include the 1976 US outbreak (number of deaths: 5) and the 1988 Wisconsin outbreak (number of deaths: 1).2009 Swine Flu Outbreak.The strain that caused the swine outbreak in 2009, on the other hand, is different from other types of swine flu viruses before. It infects humans only. Pigs show no sign of infection.

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