Chlorine needs over 15 minutes to kill some viruses, which is why it is best used as a disinfectant in the water supply or in pools where it can sit.

Question: In a previous column about pool mildew, you talked about using a solution of 50:50 pool chlorine and water. Is regular bleach the same concentration? I think pool chlorine is 10 percent ...

Using bleach, a powerful disinfectant, may be part of your cleaning routine. But there are some surfaces and places in the home where using this strong chemical may cause more harm than good. Getting ...