Contact tracing close contacts includes an interview with the initial case to collect basic information, identify contacts, and provide resources and instructions for isolation. Contact tracing is not conducted for deceased individuals, or residents of jails and long term care facilities. These cases are excluded from this calculation, and are handled in separate and specialized health investigations. Close contacts without valid contact information are not included in the metric. If contact information is identified at a later date, the contact is included in the metric at that time, even though it may have passed the ideal contact window. An individual can be a close contact of multiple positive cases. Three contact attempts are made before a contact is marked loss-to-follow up. The moving average of the percentage of close contacts with a contact attempt within two days will be calculated using a 7-day window, inclusive of the end date. The result will be a 7-day average weighted by the number of cases on that day. Currently, since there are too few days to calculate a 7-day average, each day will build, from a 3-day average on June 14, a 4-day average on June 15, etc., through a 7-day average starting on June 18. We begin reporting on June 12 as data were transitioned to the new contact tracing system between Jun 3rd - Jun 11th, which prevented our ability to accurately estimate the number of call attempts during the transition period. We will build up to a 7-day average on the June 18 notification date. Data are subject to change on a daily basis and reported at a 4-day lag for proper analysis. This data is used to calculate the Reopening DC metric with the percentage of close contacts of positive cases with at least one contact attempt is made within two days of case notification to DC Health.