Coronavirus disease (COVID-19) technical guidance by WHO Household transmission investigation protocol | Page 15

Table 1. Summary of data-collection tools
Form
number
Purpose of form
CONFIRMED CASES
Form 1A
Case initial report
form. For confirmed COVID-19
cases. As soon as possible after laboratory
confirmation of a case (Day 1).
Forms 2, 3
and 4. For confirmed COVID-19
cases: outcomes At home visits (Days 7, 14 and 28)
respectively after initial symptom onset of
the case.
Case follow-up
forms.
Collecting from whom?
HOUSEHOLD CONTACTS
Form 1A
Contact initial
reporting form.
For household contacts
of confirmed COVID-19
cases.
Forms 2, 3
Contact follow-
For household contacts
and 4.
up forms-
of confirmed COVID-19
cases: o utcomes.
Symptom
Record the
For confirmed COVID-19
diary.
presence or
cases (if possible) and
absence of
household contacts of
various signs or
confirmed COVID-19
symptoms.
cases.
CONFIRMED CASES AND HOUSEHOLD CONTACTS
Form 5
Laboratory
For confirmed COVID-19
results report:
cases and household
track and
contacts of confirmed
summarize all
COVID-19 cases.
laboratory results
(and methods
used).
When should it be collected?
As soon as possible, ideally within 24 hours
after laboratory confirmation of the primary
case (Day 1).
At home visits (Days 7, 14 and 28)
respectively.
For a minimum of 14 days and up to 28 days
after administration of the initial
questionnaire (Form 1a/1b).
This table will need to be filled in/updated at
each specimen-collection time point above.
Fig. 3. Timeline of data and specimen collection in the household transmission study
Day since
recruitment
Home visit
and data
collection.
Respiratory
sample.
Serum sample
(dependent
on country).
Other
specimens (if
relevant).
Symptom
diaries.
1
…
7
…
(optional)
14
(optional)
(optional)
… 28
(optional) (optional)
Highly
encouraged
(optional – situation dependent)
Highly encouraged
Orange boxes indicate activities that are needed for the study.
Light orange boxes indicate when serum collection (or symptom diary) is highly encouraged, but not essential, according
to resources and capacity.
Green boxes indicate where additional specimens could be collected above the minimum specimen requirements of this
study to increase information available. Please note that this could also include collecting specimens from household
contacts when they first become symptomatic.
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