1.

There are how many strains of H u0026 N proteins that cumulatively make up the HN breed of flu virus (eg. being the presently famous H1N1 virus)

A. 9 u0026 9 respectively
B. 16 u0026 16 respectively
C. 9 u0026 16 respectively
D. 16 u0026 9 respectively
Answer» E.


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