Blood bot is messenger bot used to communicate between people who are in need of blood and those who could donate it nearby them.
For example: If you are in Cairo, and you want to give blood with A+ type, you don't have to move through all your Facebook groups or hospitals asking for blood banks.
It very easy now. You can go on Facebook messenger, search for " Blood Bot ", and follow the instruction with how to donate. If you've talked with the messenger bot before and told him that you're a donor, you will receive an immediate message telling you that there is someone nearby that's in need of blood.
It also gives flexibility with communication between donors and receiver through chat unknown-to-unknown, or swap phone/name between them.