Individuals sneezing or coughing due to a cold or flu are contagious regardless of their perceived stage of illness.

“if you’re around somebody that’s coughing and sneezing and they tell you they are “not contagious”, run (unless you’re the caretaker of course). They have no idea. They have no idea what they’re talking about. True, you can still have symptoms without being contagious, but nobody knows exactly when the window closes. There have been several studies that we talk about during the episode, but this idea that people “know” when they are contagious and not contagious is not supported by anything real.”