Case Definition
Population
Reporter
Timeliness
Active/Passive
Fever (> 100F) AND (cough and/or sore
throat) in the absence of a known cause
other than influenza
Fever (> 100F) AND (cough and/or sore
throat) in the absence of a known cause
other than influenza
Fever cases in the absence of a known
cause other than influenza
University A
students
Clinicians
Daily
Passive
Data
Collection
Methods
Manual
University A
students
Nurses
Daily
Passive
Manual
ED Patients aged
17-24 years
Clinicians
Daily
Passive
Electronic
Student self-reported influenza-likeillness via emails and phone calls
Student self-reported influenza-likeillness, temperature taken by the head
athletic trainer
Student self-reported influenza-likeillness
University A
students
University A
students
Deans
Weekly
Passive
Manual
Athletic
Trainers
Weekly
Passive
Manual
University A
students
Resident
Assistants
Daily
Passive
Manual
Pre-packaged meals, masks and
thermometers picked up in student
resident halls
Employee self-reported influenza-likeillness via phone calls
University A
students
Resident Hall
Offices Staff
Weekly
Passive
Manual
University A
Facilities Office
and Dining
Services
employees
Timekeeper
Daily
Passive
Manual
Retrospective
Employee
Absenteeism
“Unscheduled leave” taken by non-union
employees and “sick leave” taken by
employees from the union.
Human
Resources
Staff
Bi-weekly/
Monthly
Passive
Electronic
SHS: Clinic
visits +
telephone
consultations
Emergency
Department
visits
Fever (> 100F) AND (cough and/or sore
throat) in the absence of a known cause
other than influenza
University A
employees
(excluding faculty
and employees
from Facilities
Office and Dining
Services)
University B
students
Clinicians
Daily
Passive
Manual
ED Patients aged
17-24 years
Clinicians
Daily
Passive
Electronic
Surveillance
System
SHC - Clinic
Visit + off-hour
log
SHC - Hotline
University A
Emergency
Department
Visits
Deans’ Reports
Athletic
Trainers’
Reports
Resident
Assistants’
Reports
Supply
Distribution
University B
Real-time
Employee
Absenteeism
Chief complaint of “flu” or “fever” or
discharge diagnosis of “influenza” or
“viral syndrome”.
External Data
ACHA
Fever (> 100F) AND (cough and/or sore
throat) in the absence of a known cause
other than influenza
ILINet
ILI (fever (> 100F) AND (cough and/or
sore throat) in the absence of a known
cause other than influenza
Influenza related web queries
Google Flu
Trends
Students at
participating
universities and
colleges
General public
Clinicians
Weekly
Passive
Electronic
Clinicians
Weekly
Passive
Electronic
General public
Google
searching
engine
Daily
Passive
Electronic