A patient is infected with a virus, and the viral replication has resulted in mutations that caused small changes in the viral spike proteins. This is an example of what type of virulence factor?

A. Exoenzymes
B. Antigenic drift
C. Viral adhesin



Answer :

Final answer:

Viral adhesin and antigenic drift are important factors in viral virulence.


Explanation:

Viral adhesin and antigenic drift are key mechanisms that contribute to virulence in viruses. In the case of a patient infected with a virus where mutations in the spike proteins occurred, resulting in small changes, this is an example of antigenic drift which can lead to the virus evading the immune system.


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