Amid the din of swinging cranes and the rattle of heavy trucks, Francis Ruwa weaves through the gang of casual workers who are busy offloading cargo from a ship on the quayside at the port of Mombasa. In his hand, he is carrying a bundle of pamphlets which he distributes to his colleagues as he moves on, occasionally making stopovers to exchange greetings and pass on a word of advice. Unless one pays attention, Ruwa could easily be mistaken for a salesman distributing promotional materials but he is on a campaign trail against HIV/Aids which has already claimed hundreds of employees at the prestigious state corporation.