Bombay Blood Group (Oh, hh phenotype) is found in one in every ten thousand Indians. A Chennai group of 400 donors has recorded 40 emergency matches in five years. Here’s the protocol.
When a patient with the Bombay Blood Group arrives in a trauma ward, the odds of an in-house match are close to zero. Even large blood banks rarely stock it. Historically, this meant hours of frantic calls; sometimes it meant a preventable death.
In 2020, we started a WhatsApp group with 47 verified donors of rare phenotypes across Tamil Nadu. Today, the group has 400+ donors covering Bombay Blood Group, Rh-null and several other rare variants. Forty confirmed lifesaving transfusions have originated from this group.
The protocol is deliberately simple: (1) donor verification is done in person once, then trusted. (2) Only doctors post requests, and requests must include hospital name, verifying doctor and patient ID for cross-check. (3) No forwards outside the group.
The reason it works is boring — verification and clear escalation. There is no fancy technology. WhatsApp’s address book is enough. The organising cost is one hour a week from one physician.