text_1: Legionnaires' disease can be contracted from a face mask used repeatedly.
text_2: In May, the Centers for Disease Control and Prevention (CDC) issued guidance for reopening buildings after widespread and abrupt COVID-19 shutdowns of businesses, schools, and other facilities. Those closures resulted in decreased water usage, which could contribute to pooling in water systems that are prime locations for the growth of Legionella bacterium. Combined with shutdown-related declines in water chlorination and regular cleaning, the agency noted that the bacteria may accumulate in standing water over the course of weeks or months before being aerosolized through devices like showers, hot tubs, fountains, and air conditioning cooling towers used once localities reopen.