Tamiflu - the controversial drug - has been stockpiled by the government for use in a flu pandemic and endorsed by regulatory bodies including the WHO. With a new review of the evidence due this week, Inside Health's Margaret McCartney and James Cave, Editor of the Drug and Therapeutics Bulletin have been following the story. Mark Porter gets his body fat checked and finds out how much is hiding inside. And how should doctors raise concerns about a person's weight? Plus, why you might want to think twice before paying for a total body scan.