Blood Brothers is one of four films made for the Bill and Melinda Gates Foundation as part of the AIDS Jaago project on the subject of AIDS awareness. Directed by that unheralded master, Vishal Bhardwaj, this short film of less than 20 minutes is a marvelous piece of drama. Featuring a top cast of Siddharth, Pavan Malhotra, Ayesha Takia, and the peerless Pankaj Kapur (with whom Vishal seems to have a special 'setting' - such is the charm of his cameo), the film has some excellent story-writing.
Without ever tresspassing on 'preach'-ery, the film works both as a piece of socially relevant material as well as pure story-telling. If all this wasn't enough, perhaps you may be interested in the facts that the film was shot by Guillermo Navarro (Pan's Labyrinth among others) and is based (partly) on a story idea by screenwriter Matthew Robbins.
The film can be viewed online. While you are at it, have a look at the others in this pack of four (Mira Nair, Farhan Akhtar and Santosh Sivan completing the quadruple).