At 10:00 a.m. on May 10, Shanghai held a press conference on COVID-19 prevention and control. It was stated at the conference that, in accordance with regulations, disinfection must be carried out at the residences of individuals who test positive for COVID-19. The Center for Disease Control has developed a series of disinfection protocols and evaluation standards. Home disinfection targets households with positive cases, but there is one exception — in older residential communities where kitchens and bathrooms are shared.