Drift
1. Drift is a process in which influenza virus undergoes mutation.
Notes: The amount of change can be subtle or dramatic, but eventually as drift occurs, a new variant strain will become dominant. This process allows influenza viruses to change and re-infect people repeatedly through their lifetime and is the reason influenza virus strains in vaccine must be updated each year.
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(Source: Business Continuity Management Institute - BCM Institute) |
