She had a curious Infectiousness.
"The Enchanted April"
Elizabeth von Arnim
We hear a great deal about the Infectiousness of bad things and people are always talking about infectious disease and of corrupting influences in the world and all that sort of thing.
"Parent and Child Vol. III., Child Study and Training"
Mosiah Hall
Doctor Jim lived on with his habits unchanged, his laugh, only, losing something in volume and more in Infectiousness.
"Our Nervous Friends Illustrating the Mastery of Nervousness"
Robert S. Carroll