If someone in your home becomes infected with Covid-19, they should self-isolate in their room and, when personal interaction is necessary, wear a face mask and observe physical distancing. But what household cleaning and disinfecting measures should be taken during the illness and after the person has recovered? Many people feel compelled to scrub down the home from top to bottom and disinfect all surfaces. Is this really necessary? Experts disagree. Germany’s Federal Centre for Health Education (BZgA) recommends that frequently touched surfaces such as light switches, door handles, bath and …