H Influenza stands for Haemophiles Influenza.
It’s a bacterial infection not viral infection.
It spreads through respiratory droplets when an infected person coughs or sneezes.
It primarily causes respiratory illnesses and, in severe cases, can lead to infections like meningitis or pneumonia.

Fertile layer of soil is called Topsoil or Horizon.
There are three layers of fertile soil which A Horizon, B Horizon and C Horizon.

There are three parts of Kidney which are Renal Cortex, Renal Medulla and Renal Pelvis.
Cortex is also known as Renal Cortex or Kidney Cortex.
Cortex is outer layer of Kidney tissues.