No: Chemo can cause severe mouth lesions which can be very painful, it they are not contagious.
Answered 8/19/2013
4.9k views
Depends on cause...: Chemo can cause mucositis (break down of the lining of the mouth), and this is not contagious. If someone has a history of cold sores and is infected with the herpes simplex virus, this virus can become reactivated from the dormant state during chemotherapy. These mouth lesions would be contagious.
Answered 4/28/2015
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