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Infectivity
is the ability of a virus to jump from
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one
person to another. The recipient must
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receive
a dose large enough to cause the
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disease.
From epidemic reports, it appears that
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SARS
virus has low infectivity (ie it requires a
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large
dose to pass on to the recipient). Other
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members
of the coronavirus family have very
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high
infectivity.
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Virulence
is the property of the virus to cause
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damage
to the patient’s organs. The SARS virus
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is very
virulent. Other members of the
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coronavirus
family have low virulence.
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