Influenza virus can exhibit constant mutation of viral glycoproteins called ________,or ________,a more serious phenomenon caused by the exchange of a viral gene with that of another influenza virus strain.

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Influenza virus can exhibit constant mutation of viral glycoproteins called antigenic drift, but a more serious phenomenon is caused by the exchange of a viral gene with that of another influenza virus strain, which is called antigenic shift.

Influenza Virus Can Exhibit Constant Mutation of Viral Glycoproteins Called