As a result of an antigenic shift

Question

Quizplus · Accepted Answer

Antigenic shift involves a major change in the hemagglutinin (HA) protein of the influenza virus, which allows the virus to evade host immunity by presenting a new HA structure that is not recognized by the immune system. This is the basis for the emergence of pandemic influenza strains.

Answer: C 
 The influenza viral protein M2 plays a role in the release of the viral genome into the host cell during infection. However, it is not directly involved in antigenic shift, which is a genetic phenomenon that leads to major changes in the viral surface proteins.

Answer: B 
 Antigenic shift does not improve the ability of the host immune system to detect and respond to influenza viruses. In fact, it often results in the emergence of new strains that are able to evade the immune system, leading to pandemics.

Answer: D 
 Antigenic shift is not related to the ability of alpha 2,6 receptors to bind to alpha 2,3 sialic acid residues. These receptors are involved in the initial attachment of influenza viruses to host cells, but they do not play a direct role in antigenic shift.

As a Result of an Antigenic Shift