Antigenic Drift

1. Antigenic Drift is a change of the hemagglutinin and/or the neuraminidase protein on the surface of a particular strain of the influenza virus due to spontaneous mutations (called genetic plasticity). It occurs on an ongoing basis in both Influenza Type A and Influenza Type B strains and necessitates ongoing changes in the composition of influenza vaccines.

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(Source: Business Continuity Management Institute - BCM Institute)

A Manager’s Guide to Implementing Your Infectious Disease Business Continuity Plan

A Manager’s Guide to ISO 22301 Standard for Business Continuity Management System