satheesh
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Rhinovriuses are causative agents of the common cold. No vaccine is available against these infections, because:
A)It has been difficult to attenuate the virus in the laboratory for vaccine preparations
B)It mutates rapidly
C)Human rhinoviruses combine with animal strains so that new antigenic types continually emerge
D)There are too many serotypes, which makes vaccination impractical
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satheesh
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| oddissy4u
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D?
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| satheesh
Forum Junior
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correct"
i think
B for HIV
C for influenza
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satheesh
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| oddissy4u
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yes n HIV is an eg of antigenic drift (mutations)
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| satheesh
Forum Junior
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can you explain what is genetic reassortment which is a mechanism for genetic shift
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satheesh
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| oddissy4u
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:arrow: C is an eg of genetic reaassortment, when 2 strains of same virus result in new genetic composition ---
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