Hello, I am new to these forums, so I apologize if this has already been asked, since I can't find an answer in another thread.

About 20 months ago, I was diagnosed with mononucleosis. It is my understanding that once a person has been infected, they are a carrier for the rest of their life, but rarely (if ever) show symptoms after the initial infection. After researching this condition, it is also my understanding that people usually only show symptoms if they are infected as a teenager, or older- Thus, if he/she was exposed to the virus that causes mono as a child, he/she could be a carrier without ever showing any symptoms.

I have read statistics that some 90%'ish of the population will not get symptoms when exposed to mono because they have already been previously exposed (are carriers) and will have built up an immunity.

I have recently met this girl, and we have our first date this weekend. I am scared to death that she might want to kiss because I really like her and I don't want her to get sick because of me. I stopped showing symptoms around 18 months ago, but I have read that the virus can be passed on for the rest of one's life as long as one is a carrier.

So, the question: Is there any sort of medical test that can be done to determine if she is already a carrier (and therefore will not develop symptoms if we kiss because she has already built up an immunity to it)?
If there is indeed a test, and she turns up negative as a carrier, is there any way to prevent her being infected by this virus from me?

Thank you very much for your time and help.