The most appropriate term is fomite, with tilde. It means that it encourages. It is a term used in Medicine to designate an inert object or body that can serve as an intermediary for the transmission of a virus or bacteria. It can be for example a handrail or the door knob.
FOMITE:FOME: PROMOTE, PROMOTE, EXCITE, STIMULATE, ACTIVATE.
inanimate object or substance which is able to transmit a pathogen of an individual organism to another.