In disease surveillance, it is always important to know the onset of diseases over the period and geographical areas. Usually it is incidence date.
In current setting, we have limited opportunities to analyze through incident date in DHIS2. It can’t be analyze according to period like event date and enrollment date.
Count of enrollment V{enrollment_count} work on enrollment date.
Example: To know the onset of measles (incidence) according to the month of 2017 or in last 12 months.
One option probably add program variable called V{incident_count} in program indicator or enrollment count based on incident date.
I have posted a jira issue: https://jira.dhis2.org/browse/DHIS2-2486
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Nayeem Al Mifthah
Consultant for HSS, Health MIS, M&E
Email: n.mifthah@gmail.com
Cell:+8801914030574
Skype: nayeem.a.m