New cheaper TB respirators starting to enter the market.
D002487:Centers for Disease Control and Prevention, U.S.; D006801:Humans; D017758:Infectious Disease Transmission, Patient-to-Professional / Q000517:prevention & control; D016273:Occupational Exposure / Q000517:prevention & control*; D010564:Personnel, Hospital; D012134:Respiratory Protective Devices / Q000191:economics / Q000592:standards*; D014376:Tuberculosis / Q000517:prevention & control* / Q000635:transmission; D014481:United States; D014489:United States Occupational Safety and Health Administration