Viruses From Animal and Plants
West Nile virus can cause a disease in human beings that may be transmitted from an infected bird to a person by a mosquito. This is an example of

arthropod borne disease
fomite borne disease
nosocomial infection
endogenous infection

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Viruses From Animal and Plants
Influenza virus undergoes antigenic shift resulting in major antigenic changes by which of the following mechanisms?

Somatic recombination of heavy and light chains
Reassortment of RNA segments from different influenza viruses
Changing the receptor binding canyon that docks with the host receptor
Expression of several different capsule types

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