Viruses overcome antibodies formed during previous exposure by -
Antigenic Drift - small mutations in genes changes the shape of antigen , so antibodies can no longer bind them
Antigenic Shift - 2 or more strains combine to form new strain
Antigenic Drift - small mutations in genes changes the shape of antigen , so antibodies can no longer bind them
Antigenic Shift - 2 or more strains combine to form new strain
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ReplyDeleteAntigens and antibodies