Host: Can kissing someone who has recently ingested the food I am allergic to, cause an allergic reaction? Bob B. Gravani: For severely food allergic consumers being associated with someone who has just consumed the product that you have a severe allergy to, could be indeed life threatening. So, a person must be careful to avoid contact with an individual who has consumed these kinds of products and again if you are associating with someone with a severe food allergy, you got to be aware of the fact that, those offending food should be avoided from a close contact with that individual.