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antigenic drift |
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antigenic drift (an´tējen´ik), n the ability of viruses to alter their genetic makeup, thereby creating mutant antigens and bypassing the antibody barrier of the host. |
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Antigenic drift of H5N2 viruses belonging to the Mexico lineage, resulting in lower identity (less similarity) to the vaccine strain, has been described (16). Antigenic drift refers to successive small point mutations that occur with successive replication. At present that is not the case, but influenza viruses are notorious for their ability to mutate via a process called antigenic drift. |
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