I just got home from taking in yet another sputum sample. One gal usually just looks at it and tells me it's just spit. I could have handed an empty vile to this gal. I'm sure it's just spit. They told me not to drink anything in the morning to bring up a good sample. I didn't. I did the saline and Aerobika. My husband also got up and did percussions on my back. Still just spit. I did buy some of the tea. Do I drink that in the morning or the night before? I'm sure I'm going to get a call to bring in another sample.