you need a flu shot every year/season because (HA-haemoagglutinin; NA-neuroaminidase) A) the virus can change its HA and NA every year, so a new shot is needed to teach your immune system how to recognize the changed HA and NA B) flu virus gets rid of its HA and NA and replace them with completely new ones every year C) your immune system weakens after a year-so you have to get another shot to get the system strong enough to attack the virus D)antigen shift occurs every year
you need a flu shot every year/season because (HA-haemoagglutinin; NA-neuroaminidase) A) the virus can change its HA and NA every year, so a new shot is needed to teach your immune system how to recognize the changed HA and NA B) flu virus gets rid of its HA and NA and replace them with completely new ones every year C) your immune system weakens after a year-so you have to get another shot to get the system strong enough to attack the virus D)antigen shift occurs every year
Human Biology (MindTap Course List)
11th Edition
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cecie Starr, Beverly McMillan
Chapter9: Immunity And Disease
Section: Chapter Questions
Problem 4CT
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you need a flu shot every year/season because (HA-haemoagglutinin; NA-neuroaminidase)
A) the virus can change its HA and NA every year, so a new shot is needed to teach your immune system how to
recognize the changed HA and NA
B) flu virus gets rid of its HA and NA and replace them with completely new ones every year
C) your immune system weakens after a year-so you have to get another shot to get the system strong enough to
attack the virus
D)antigen shift occurs every year
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