Contact Tracing

Contact Tracing Statistics

In contact tracing, public health staff work with an individual who has a positive test for COVID-19 to help them recall everyone with whom they have had close contact during the timeframe while they may have been infectious. Read more about Delaware's contact tracing plan

June 27 - May 12
Represents all data since the launch of the current contact tracing system. Earlier cases were investigated and contact traced using a different system.

Total contacts named

140,360

Contacts reached

73,308
52% of total contacts named

Avg. contacts per case

2.4

Cases with known exposure to another case

24,517
26% of total positive cases

Total positive cases

Reported June 27 - May 12.

95,640

4,595

5% of total positive cases

Cases not eligible for interview

  • Incarcerated cases: 1342
  • Hospitalized cases: 1669
  • Long-term care cases: 1584

Cases eligible for interview

No attempt is made to interview incarcerated persons, hospitalized persons, and long-term care residents because these individuals are monitored by the institutions responsible for their care.

91,045

95% of total positive cases

17,685

19% of cases eligible for interview

Cases without a validated phone number

Phone numbers that are originally provided may not always be correct or current and are therefore evaluated for validity.

Only valid phone numbers (work, home, cell, etc.) are counted on this dashboard. New efforts to obtain and validate phone numbers are being explored.

Cases with a valid phone number

73,360

81% of cases eligible for interview

17,405

19% of cases eligible for interview

Cases not reached

Not all those eligible for interview are reached.

Reasons why people aren't reached right away:
  • Person is unavailable or busy
  • Interviewer gets no answer, voice mail, or busy signal
  • Interviewer is told they have the wrong number, is disconnected, or gets fast busy signal
  • Person is determined to be hospitalized or incapacitated
  • Person fails to verify their identity on the phone
Reasons why people aren't able to be reached at all:
  • Person is determined to be deceased

Cases reached

Includes cases that could not be reached by phone that were reached by field teams.

Cases reached within 24 hours:
49517 or 67%

73,640

81% of cases eligible for interview

14,215

19% of cases reached

Cases who did not complete interview

Not all those who are reached are interviewed immediately.

Reasons for a delayed interview:
  • Person is hard of hearing, will be interviewed by an ESL interpreter in person
  • Person has a language barrier, will be interviewed by the appropriate interpreter
  • Person was busy, made an appointment for a later time
Reasons for no interview:
  • Person did not consent to being interviewed
  • Person refused to speak with interviewer
  • Person told interviewer they never tested positive

Cases who completed interview

59,425

81% of cases reached

19,293

32% of cases who completed interview

Cases who named no contacts

Cases who named at least one contact

40,132

68% of cases who completed interview

Total contacts named

140,360

67,548

48% of total contacts named

Contacts without a valid phone number

Phone numbers that are originally provided may not always be correct or current and are therefore evaluated for validity. Only valid phone numbers (work, home, cell, etc.) are counted on this dashboard. New efforts to obtain and validate phone numbers are being explored.

Contacts with a valid phone number

72,812

52% of total contacts named

67,052

48% of total contacts named

Contacts not reached

Not all those eligible for interview are reached.

Reasons why people aren't reached right away:
  • Person is unavailable or busy
  • Interviewer gets no answer, voice mail, or busy signal
  • Interviewer is told they have the wrong number, is disconnected, or gets fast busy signal
  • Person is determined to be hospitalized or incapacitated
  • Person fails to verify their identity on the phone
Reasons why people aren't able to be reached at all:
  • Person is determined to be deceased

Contacts reached

Includes contacts that could not be reached by phone that were reached by field teams.

73,308

52% of total contacts named

13,520

18% of contacts reached

Contacts who did not complete interview

Not all those who are reached are interviewed immediately.

Reasons for a delayed interview:
  • Person is hard of hearing, will be interviewed by an ESL interpreter in person
  • Person has a language barrier, will be interviewed by the appropriate interpreter
  • Person was busy, made an appointment for a later time
Reasons for no interview:
  • Person did not consent to being interviewed
  • Person refused to speak with interviewer

Contacts who completed interview

59,788

82% of contacts reached

56,712

95% of contacts who completed interview

Contacts not known to be tested or tested negative

Contacts are encouraged but not required to get tested.

Contacts known to be tested and tested negative:
660 or 1%

Contacts not known to be tested:
56052 or 94%

Contacts known to be tested and tested positive

Contacts are asked by the interviewer if they have been tested for COVID.

3,076

5% of contacts who completed interview

Help us trace the virus: Answer the call

Additional ways you can help:

  • Provide a valid, up-to-date phone number when you get tested, so we have the best contact information to reach you.
  • Ensure your doctor has your current phone number on file if you get tested by your primary care provider.
  • If you test positive, start thinking about the people you have had close contact with recently.
  • If you get a call from (302) 446-4262, or your caller ID says DE PUBLICHEALTH, that’s a representative from the Delaware Contact Tracing Program calling to give you important information about your health. Please answer the call and take the time to speak with our contact tracers.

Mitigation Strategies Timeline

To learn more about what you can do to mitigate the impact of COVID-19, go to Delaware's coronavirus response website

Mitigation Status From Until Details
Additional interim steps to expand personal care services to 60% of fire code occupancy June 22 Further Notice Announcement
Youth and adult recreational sports tournaments may resume – subject to the prior approval of a tournament-specific safety plan by the Division of Public Health (DPH) and following other guidelines June 20 Further Notice Announcement
Phase 2 of Delaware's Economic Reopening plan in effect June 15 Further Notice Announcement
Industries at 30% fire code occupancy can increase capacity to 60% of fire code occupancy unless otherwise noted; other restrictions apply June 15 Further Notice Announcement
Houses of worship encouraged to hold virtual services; 60% occupancy allowed June 15 Further Notice Announcement
Vulnerable individuals should shelter in place June 1 Further Notice Announcement
Employers are encouraged to continue to have staff work from home whenever possible June 1 Further Notice Announcement
Phase 1 of Delaware's Economic Reopening plan in effect June 1 June 14 Announcement
Select industries to open and limit capacity to 30% of fire code occupancy; other restrictions apply June 1 June 14 Announcement
Local govts. may impose greater restrictions, as permitted by law May 22 Further Notice Announcement
Beaches, community pools to reopen with restrictions May 22 Further Notice Announcement
Statewide contact tracing plan May 12 Further Notice Announcement
Significant expansion of statewide testing program May 8 Further Notice Announcement
Face covering required in public settings April 28 Further Notice Announcement
Schools closed through academic year; offer remote learning April 24 Further Notice Announcement
Individuals who enter Delaware from another state must self-quarantine for 14 days, with exceptions March 29 June 1 Announcement
Stay-at-Home order; Non-essential businesses closed March 22 June 1 Announcement
State of Emergency in effect March 12 Further Notice Announcement

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