Pop Health Twitter Roundup (7/7/11)

The latest and greatest from @PopHealth

• Johns Hopkins U studying whether public health trends can be tracked via Twitter

• New study calculates number of deaths caused by poverty

• Ironic tragedy: motorcyclist crashes, dies, during ride to protest helmet laws in New York

• Worrisome trend -- state preemption of local govts' adopting policies that would improve health in their communities

• State of WI blocks plans to apply for federal health grants

• The socio-economic significance of food deserts

• On the demise of Google Health, Matthew Holt @ Health Care Blog explains need for an independent health data utility

• What would happen to health inequalities if smoking were eliminated?