Through all her train the soft infection ran.
Pope.
Mankind are gay or serious by infection.
Rambler.
Syn. -- Infection, Contagion. -- Infection is often used in a definite
and limited sense of the transmission of affections without direct
contact of individuals or immediate application or introduction of the
morbific agent, in contradistinction to contagion, which then implies
transmission by direct contact. Quain. See Contagious.