The Centers for Disease Control and Prevention’s (CDC) National Healthcare Safety Network (NHSN) will be taken offline tomorrow, Tuesday, August 22, beginning at 7:00 p.m. EDT for scheduled maintenance. The system is expected to be unavailable for several hours. NHSN staff ask that users do not submit CDAs via DIRECT between 5 p.m. on Tuesday and 7 a.m. on Wednesday, August 23.