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It is commonly known as flu, a viral infection of the upper respiratory system.

I really need help ;-;​


Sagot :

Answer:

Common viral respiratory diseases are illnesses caused by a variety of viruses that have similar traits and affect the upper respiratory tract. The viruses involved may be the influenza viruses, respiratory syncytial virus (RSV), parainfluenza viruses, or respiratory adenoviruses.

Explanation: