Influenza C is rarely included in vaccine for prevention because:
A. There is no ability to form antibodies.
B. The system are the same as the common cold.
C. It is not spread the same as A or B.
D. It only affects persons who are immunocompromised.

Influenza C virus is the member of genus Influenzavirus C which causes influenza just like other influenza viruses. These viruses are known to infect pigs and humans. Type C species caused flu is rare in comparison to Types A or B.

Other common influenza viruses A and B also cause seasonal infestation every year because of their ability to shift antigenicity. Influenza virus C does not have this ability to antigenic shift and not considered as a concerned threat to human health. Because of this, it is rarely included in vaccinations against influenza virus C.

Thus, the correct answer is option C.

Influenza C is rarely included in vaccine for prevention because: A. There is no ability to form antibodies. B. The system are the same as the common cold. C. It is not spread the same as A or B. D. It only affects persons who are immunocompromised.

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Influenza C is rarely included in vaccine for prevention because:
A. There is no ability to form antibodies.
B. The system are the same as the common cold.
C. It is not spread the same as A or B.
D. It only affects persons who are immunocompromised.