A few of the recent pieces I've liked:
Andrea Elliott in the New York Times: Invisible Child: Dasani's Homeless Life
Matthieu Aikins in Wired: The Surge: "In 1988 there were 350,000 cases of polio worldwide. Last year there were 223. But getting all the way to zero will mean spending billions of dollars, penetrating the most remote regions of the globe, and facing down Taliban militants to get to the last unprotected children on Earth."
Maryn McKenna at Superbug: MRSA in UK Turkeys Raises Questions of Communication, Transparency and Risk
Elizabeth Weise in USA Today: Diseases on the move because of climate change
Al Shaw, Theodoric Meyer, and Christine Thompson at ProPublica: Federal Flood Maps Left New York Unprepared for Sandy - and FEMA Knew It