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BSC 546 Final Exam Review questions and answers
- Vak
- Instelling
Describe antigenic shift and antigenic drift and which causes isolated epidemics vs pandemics. Antigenic Drift - repeated minor antigenic changes' retains some resemblance to prevailing strains (Types A and B); able to cause isolated epidemics.1 Antigenic Shift - major change in one or both sur...
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