Can babies get mononuclosis?

Yes it is possible: However, it's possible for a young child to catch mono — for example, from a sibling's cup or spoon, another child's toy, or a smooch from an affectionate relative who has the virus.

Yes: It is transmitted the same way it is for older kids and adults.It is often very mild in infancy and early childhood and may not draw enough attention to get them into a docs office for diagnosis.