News bites: Safer food, health law polls and more

The Obama administration is claiming progress on food safety, MedPage Today reports.

Americans' opinion of the healthcare reform law is volatile, Kaiser Health News reports.

Federal officials are asking researchers to withhold information on bird-flu studies out of bioterrorism concerns, The Wall Street Journal reports.

Walgreens could lose millions of customers in its fight with Express Scripts, The New York Times reports.