I’m feeling quite unwell, sneezing and coughing, so I had a chat with my hubby who studied science.
If you don’t want to read more please leave the room..
The answer is it doesn’t have to be. It depends on the bacteria causing it.
Sorry if you are eating.
It’s a complex muco polysaccharide according to my hubby, made up of sugars in very long chains. It acts like a dye. Being green or yellow or other colours. It depends on the bacteria causing it. Viruses are colourless so I guess if you have one and get coloured mucus you might have a secondary infection?
So anyway on that note I will get some honey and lemon.