By far the most cost-effective disinfectant is chlorine, which is effective against most common pathogens, including difficult organisms such as tuberculosis, fungi, and antibiotic-resistant strains of staphylococcus and enterococcus. It even has some disinfectant action against parasitic organisms. However, it has a strong odor and could kill fish and some plants. Does anybody know any studies on the effects of chlorine existing in drinking water on the health of human body?