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I guess its possible. for example, say you were kissing that person, or came into close contact during them coughing or something, and they had eaten, or are wearing a scent, or have touched something you could react to, then its certaintly possible. I believe that their are tests you can take to more accurately find what your allergic to. Hope this helped a bit. (:

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Q: Can another persons saliva cause an allergic reaction?
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