By Vigya Sharma, Mohit Saxena
This app could save someone's life. More importantly, that someone could be You. Blood Connections is a connection of people with a common blood group within your Facebook social graph. In case of an emergency, you can query this app, to find from among your friends, people with the blood group you need. Further, you can notify them of your need, and post to their walls. The idea is, there are greater chances of finding a willing donor for yourself, from among your friends, than from random strangers on voluntary blood donation sites.