Forty-six EDs, two major pharmacy chains, two poison control centers and the Centers for Disease Control and Prevention (CDC; through a pilot partnership), all contribute data to ESSENCE on a daily basis. Thirty-six separate SSH File Transfer Protocol (sFTP) data feeds are required to transfer and incorporate these data into ESSENCE. Beginning January 1, 2011, the web-based application developed by OIT was utilized on a daily basis to ensure that the transfer of data was monitored and recorded regularly. Each morning, an epidemiologist from OP&R logs into ESSENCE and verifies which data points have been consumed into the system. The presence or absence of each data point is then recorded in the data tracking application. An automated e-mail is generated that details which data sources are absent. This e-mail is sent to the OIT employees involved in the ESSENCE program, who then check the server to see if the data were transferred or if there was an error during the transfer and consumption process. The epidemiologists then contact each data source that failed to send the data on that particular day.