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The new study examined spore response of three different strains of C. diff to three clinical in-use concentrations of sodium hypochlorite.

His idea was for doctors to rinse their hands in a solution of calcium hypochlorite.

The sodium hypochlorite - or bleach - found in swimming pools can dry it out more, leading to damage.

Check the label for its chemical name: sodium hypochlorite.

It also recommends that people “shock” their pools — adding chemicals that raise the chlorine level enough to kill algae and bacteria — with liquid chlorine, calcium hypochlorite or potassium monopersulfate instead of chlorine tablets.