We write to express disappointment with the design flaws and speculative nature of the conclusions in the short report presenting findings from a study of domestic use of bleach and infections in children.1 The article concludes that “Passive exposure to cleaning bleach in the home may have adverse effects on school-age children's health by increasing the risk of respiratory and other infections. The high frequency of use of disinfecting irritant cleaning products may be of public health concern, also when exposure occurs during childhood.”

Specific study design flaws include …