Influenza A subtype H3N2 has been a major cause of current respiratory illness in India.
The H3N2 virus has been in wide circulation in India for the past two to three months.
H3N2 causes more hospitalisations than any other subtype of Influenza A.
According to health experts, the increase in the transmission of flu virus is due to abrupt "climatic conditions currently prevalent".
Typical symptoms of H3N2 virus include high-grade fever for two-three days, body aches, headache, throat irritation, and persistent cough lasting for two weeks.
Getting vaccinated against flu, practising hand sanitation, and maintaining hydration help in fighting the H3N2 virus.
Seasonal influenza spreads easily, with the rapid transmission in crowded areas including schools and nursing homes.