Link behind reovirus infection and development of celiac disease. Research from the Dermody Lab suggests that virus infections normally thought to be non-pathogenic can exacerbate development of food intolerance like celiac disease.
Paper: http://science.sciencemag.org/content/356/6333/44
Popular press: http://www.npr.org/sections/thesalt/2017/04/08/523002516/when-gluten-is-the-villain-could-a-common-virus-be-the-trigger