infect
verb transitiveTo taint with disease; to infuse into a healthy body the virus, miasma, or morbid matter of a diseased body, or any pestilential or noxious air or substance by which a disease is produced. Persons in health are infected by the contagion of the plague, of syphilis, of small pox, of measles, of malignant fevers. In some cases, persons can be infected only by contact, as in syphilis; in most cases, they may be infected without contact with the diseased body.