Definition of "contagiousness" []

• The state or condition of being contagious. (noun)

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• "A key missing piece is information about H1N1's contagiousness, which is measured in what's called a basic reproduction number - the average number of new infections produced by a single infected person, assuming no one is immune to the virus."
• "We like to use words like contagiousness and infectiousness just to apply to the medical realm."
• "But "the effect of contagiousness stops significantly after three degrees of separation," he says."