Facebook is making it easier for you to donate blood especially in India
Reading a post by Mark Zuck on facebook, it states clearly that there is this high demand of blood donation request on facebook, and there is no way to match the demand with the request. So to bridge the gap between the demander and those who will be willing to supply, facebook created a option whereby one can voluntarily donate blood. the feature is most likely to come up in India and hopefully it will go worldwide. Read what mark said.