Contact Tracing

Contact Tracing Statistics

June 27 - September 17
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

167,080

Contacts reached

89,862
54% of total contacts named

Avg. contacts per case

2.4

Cases with known exposure to another case

28,265
24% of total positive cases

Total positive cases

Reported June 27 - September 17.

116,406

5,002

4% of total positive cases

Cases not eligible for interview

  • Incarcerated cases: 1344
  • Hospitalized cases: 1917
  • Long-term care cases: 1741

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.

111,404

96% of total positive cases

23,788

21% 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

87,616

79% of cases eligible for interview

23,491

21% 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:
58791 or 67%

87,913

79% of cases eligible for interview

17,256

20% 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

70,657

80% of cases reached

23,751

34% of cases who completed interview

Cases who named no contacts

Cases who named at least one contact

46,906

66% of cases who completed interview

Total contacts named

167,080

77,814

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

89,266

53% of total contacts named

77,218

46% 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.

89,862

54% of total contacts named

18,842

21% 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

71,020

79% of contacts reached

67,944

96% 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:
67284 or 95%

Contacts known to be tested and tested positive

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

3,076

4% 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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New Castle County
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