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infectivity
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infective
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-ity
Noun
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infectivity
(
countable
and
uncountable
,
plural
infectivities
)
The ability of a
pathogen
to establish an
infection
1972
, Charles Allan Birch,
The House Physician's Handbook
, page
70
:
The reputation for low
infectivity
of rubella was probably based on failure to recognise rashless cases.