I have had a awful chest infection and have coughed up more green slime than I care to think about. I have had to spend the last 3 nights on the sofa so my poor husband can get some sleep. I know were I got it from the kids at school are all coughing but none of them seem to know about putting there hand over their mouths as the cough. UGH none of them have any idea and just look at you blankly if you ask them too. D