how influenza virus infects the body?

Influenza virus enters the body through respiratory pathways

Virus attaches to and invades respiratory epithelial cells.

Viral replication occurs within infected respiratory cells.

Infected cells release new viral particles into the airways.

Immune response is triggered to fight the viral infection.

Inflammation and damage to respiratory tissues may occur.

Symptoms such as fever, cough, and body aches develop.

Immune system combats the virus, leading to recovery.

In severe cases, influenza can lead to complications.