A former member of the Indian Academy of Paediatrics (IAP), Dr Vipin Vashishtha was ousted from the academy for highlighting the nexus between physicians and vaccine manufacturers last year. The Bijnor-based paediatrician documented the rampant corruption and system of favours in an open letter addressed to all members of the academy. In an interview with Arushi Bedi, he lays bare the nexus and talks about how he is still under fire for raising questions. Edited excerpts: