At 2 AM, a family needs two units of O-negative. The government blood bank is forty kilometers away and has no stock. The local donor network has responded to this kind of call before. The person running the WhatsApp group has a database. The response time is thirty minutes.
That database is the difference between a workable emergency protocol and a desperate scramble through unstructured message history.
The Record Structure That Enables Fast Lookup
The Blood Group Donor Bank template centers on one field: BLOOD GROUP. Eight options (A+, A-, B+, B-, AB+, AB-, O+, O-) plus an unclassified default. Every other field in the record exists to support what happens after you filter by blood group.
NAME, Phone, CONTACT, and Adress — the mobilization data. When you filter for O-negative donors and get fourteen results, you're calling down that list. The phone number is the action field. The address tells you who's closest.
Name Of Father follows the identification convention used throughout Kerala and much of South India for record deduplication — when two donors share a common name, the father's name is the distinguishing identifier. This isn't bureaucratic padding; it's how identity verification works in the actual community context this database serves.
The Age Calculation
The Age/DB radio switches between two display modes: show a manually entered Age field, or show Age On Entry Date — a calculated field that computes datediff(Date Of Birth, Entry Date) / 365. The Entry Date is when the donor was registered.
That calculation matters for donor eligibility. Blood donation guidelines set minimum age at 18 and typically cap regular donation at 65. A donor registered three years ago might now be outside the eligible range, or a donor entered as 17 at registration might now qualify. The Date Of Birth field combined with the auto-calculated age means you can filter the registry for currently eligible donors without updating age fields manually every year.
The FOTO field is the visual confirmation layer for in-person verification at donation events. The AUDIO field and Link to file handle voice notes and attached medical clearance documents for donors with relevant health history.
At the community level — a temple committee, a residential welfare association, a university blood club — this registry running on a shared Memento group is the difference between a functional emergency response network and a group chat that goes quiet when the answer matters most.