Written by Om Marathe |New Delhi |Updated: September 9, 2019 10:12:57 am
Explained: How influenza is classified as H5N1, H1N1 and other kinds
The WHO defines influenza as “a contagious, acute respiratory illness caused by influenza viruses, usually influenza A or B subtypes.”
On September 3, India was again declared free of the H5N1 virus, which causes avian influenza or bird flu, the earlier such declaration having come in 2017. In the last two years, there had been outbreaks of the disease in Odisha, Bihar, and Jharkhand.
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