Explained: How influenza is classified as H5N1, H1N1 and other kinds

According to the WHO, influenza is known to affect 5-10% of adults and 20-30% of children across the world every year. The many kinds of viruses causing influenza are identified by a standard nomenclature issued by the World Health Organization (WHO) in 1980.

from News Explained: Indian Express Expert Opinion, Expert Opinion on Social Issues | The Indian Express
Read The Rest:indianexpress...