We are, thank God, beginning

We are, thank God, beginning to convince people of the idea that pillows should be washed or thrown away. Some people were using six-year-old pillows continuously without being washed, in unventilated bedrooms where the windows were kept shut at night. At the end of the six years, a tenth of the weight of the pillow consisted of old human skin, mould growing on the skin, mites growing on the mould, dead mites and mite dung. If you ask children to put their heads down on bags of grot like that night after night for a third of their lives, you don't have to invent traffic fumes as a cause of asthma.