Although the world was better prepared for a pandemic flu than it had ever been, the H1N1 strain blindsided scientists, who'd been expecting an avian strain. After months of covering the nearly daily briefings about swine flu, we set out to explain to readers why the scientists were caught off guard. The bottom line: No one was watching the pigs.
Read "Special Report: Surveillance Gap Slowed H1N1 Pandemic Response"
See the archived story and questionnaire in which the reporter writes about how this story was written.