Why Is It Necessary to Receive a New Flu Vaccine

question 40

Essay

Why is it necessary to receive a new flu vaccine each year?

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Definitions:

Cochlear Implants

Cochlear implants are medical devices that bypass damaged structures in the inner ear and directly stimulate the auditory nerve, allowing individuals with profound hearing loss to perceive sound.

Deafness

Having a diminished ability to hear or complete hearing loss.

Natural Hearing

The ability to perceive sound through the ear's normal anatomical structure and neural processes without the aid of any artificial devices.

Echolocation

The biological sonar used by several kinds of animals to navigate and to locate prey or other objects by emitting sound and listening to the echoes.