2025 Flu. March 19, 2025 6:00 am edt. Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system.

 — ministry of health & family welfare guidelines and reference material for seasonal influenza (h1n1) recommended composition of influenza vaccine to use in. Published 18 september 2025 | for reporting week 36, ending 8 september 2025.