question: My son has a flu like virus. Sneezing, coughing, stuffy nose and now I have it. I have been sneezing all day and I ate some Chinese food with a coworker today and notice driving home I had a horrible taste in my mouth. When I went home I brushed my teeth and tongue and looked in the mirror and there was a thin layer of a white substance on it. Is that from brushing my teeth? Is the bad taste coming from the virus?