infectivity

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noun

The ability of a pathogen to establish an infection

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Meanings

nouninfectivity (countable and uncountable, plural infectivities)

plural infectivities

  1. countableuncountableThe ability of a pathogen to establish an infection

    The reputation for low infectivity of rubella was probably based on failure to recognise rashless cases.

    1972, Charles Allan Birch, The House Physician's Handbook, page 70

Origin

From infective + -ity.

Full word history & related roots →
Cite this entry
APA

infectivity. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/infectivity

MLA

“infectivity.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/infectivity. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “infectivity,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/infectivity.

Source: infectivity on Wiktionary, CC BY-SA 4.0.