Contact Tracing

Contact Tracing Statistics

June 27 - July 31
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

147,546

Contacts reached

78,861
53% of total contacts named

Avg. contacts per case

2.4

Cases with known exposure to another case

25,342
25% of total positive cases

Total positive cases

Reported June 27 - July 31.

100,591

4,803

5% of total positive cases

Cases not eligible for interview

  • Incarcerated cases: 1342
  • Hospitalized cases: 1819
  • Long-term care cases: 1642

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.

95,788

95% of total positive cases

18,851

20% 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

76,937

80% of cases eligible for interview

18,564

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:
51949 or 67%

77,224

81% of cases eligible for interview

14,896

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

62,328

81% of cases reached

20,512

33% of cases who completed interview

Cases who named no contacts

Cases who named at least one contact

41,816

67% of cases who completed interview

Total contacts named

147,546

69,226

47% 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

78,320

53% of total contacts named

68,685

47% 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.

78,861

53% of total contacts named

14,939

19% 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

63,922

81% of contacts reached

60,846

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:
60186 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.

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Coronavirus (COVID-19)
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