One of the questions now being raised is whether public health decisions are being based on sound science. At the center of this debate is the question of testing travelers from affected countries for fever, which some infectious disease researchers -and people in the countries themselves- argue is unlikely to be successful. But there is also the larger question of how much we know about the transmission of the virus. For a good discussion of these issues, see David William’s article in the “LA Times.” Williams interviewed C.J. Peters, a senior and respected figure in the field of infectious disease, who points out what we still don’t know about this virus.