Near the end of Steven Soderbergh’s epidemipic Contagion, as the bodies pile up around the world, a scientist goes to visit her dying father in hospital. She takes off her face mask. ‘What are you doing?’ he asks. ‘It’s OK,’ she says, and kisses him on the forehead. In a previous scene we’ve seen her inject herself with an experimental vaccine, and now she's testing it. ‘Do you remember Dr Barry Marshall?’ she says. ‘He thought that bacteria, not stress, caused ulcers. Gave himself the bug and then cured himself. You taught me about him.’ The New York Times journalist Lawrence Altman called his history of self-experimentation in medicine Who Goes First? When I got home from the cinema I found a flyer with a jaunty space-invader graphic lying on the floor among the kebab-house menus and cab-company cards. ‘Help us beat cold and flu bugs!’ it said. ‘Help save extra lives.’ I read on: