The symbol is also an Ancient Egyptian hieroglyph which represents the hieroglyph Â´nh (ankh) meaning life or breath of life. The glyph appears in an incredible number of inscriptions and was often used as a decorative device.
Some of the common summer viruses-- in particular the enteroviruses that can cause diarrhea and the well known hand-foot-mouth disease-- are easily acquired from other children who swim in the same pool. Drinking too much pool water can also cause diarrhea because of the chlorine. Although swallowing some pool water is inevitable, teaching a child proper technique in the water may save you from having to deal with this intestinal complaint.
When chlorine bleach is mixed with an acid (as can be found in some toilet bowl cleaners, glass and window cleaners, dish detergents, vinegar, and drain cleaners) chlorine gas is given off. Chlorine gas exposures, even at low levels, almost always irritate the mucous membrane and causes coughing and breathing problems, burning watery eyes, and a runny nose. Higher levels can cause chest pain, severe breathing problems, fluid in the lungs, pneumonia, and vomiting. Very high levels can cause death.