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I've got mono, and I'm pretty sure I've passed it along to my boyfriend. If he also has mono, then is there any harm in kissing him, since we would both now have had it? If he does not have mono, how long until I can kiss him again?


Well, after a person contracts the virus, they don't actually become ill until 4-8 weeks later. So, your boyfriend may have it, but he may not get sick for a while.

You're able to give him the virus at any time that you have the illness, but after about a week of having a virus, it becomes harder to carry to another person.