infectivity
noun
- pathogen's ability to infect hosts
Wiktionary
noun
Etymology: Etymology tree English infective Proto-Indo-European *-teh₂ Proto-Indo-European *-ts Proto-Indo-European *-teh₂ts Latin -itāsder. Old French -itebor. Middle English -ite English -ity English infectivity From infective + -ity.
- The ability of a pathogen to establish an infection
“The reputation for low infectivity of rubella was probably based on failure to recognise rashless cases.”