White vs Yellow

...so i'm home alone on a Saturday night doing my ironing and coughing up so much phlegm it's crazy. I thought I was getting over this flu but apparently drinking and smoking doesn't help much. Steve and I were chatting this morning about phlegm and he reckons that the deep yellow phlegm (which is what i'm hacking up) is you're-still-sick and the white phlegm is you're-getting-better.

I hope tomorrow is an all white phlegm day.