Swine flu has claimed more than 1,000 lives in India this year: Here's what you need to know about this viral disease
FirstpostMore than 27,000 people have already been diagnosed with swine flu and 1,167 have died from the disease in India this year. A highly contagious viral disease, swine flu occurs as a result of Influenza A infection - there are close to 30 subtypes of this virus, only three are known to cause swine flu. Research shows that most cases of swine flu occur because of H1N1 infection, although other strains of the virus — especially H3N2 — can also cause this disease in humans. The year 2009 saw the first human pandemic of swine flu in 40 years, according to the US Centres for Disease Control - America’s national health protection agency. The high-risk category for swine flu also includes people with lung, liver, heart, kidney, blood or neurological disease and people with weakened immune systems who are on long-term cortisone therapy.