Snots

The colours of snot

Snot can be of different colours. In fact, as days go by, what comes out of our noses is of a variety of colours. 
 

For example, when the cold virus infects the nose, the snot is very clear. This snot helps eliminate the virus. As days go by and our body gradually defeats the infection, the snot becomes white or yellow. When our body seems to return bit by bit to normal, the snot becomes more greenish. 

Oh! And above all it is important to use disposable paper handkerchiefs, because otherwise we would infect ourselves again, and the snot would never end.