Eggs

The spread of an avian flu virus in cattle has again brought public health attention to the potential for a global pandemic. Fighting it would depend, for now, on 1940s technology that makes vaccines from hens’ eggs.

A surge in salmonella cases around the country prompts a warning for backyard chicken owners from the Centers for Disease Control and Prevention.

A study found consuming two eggs per day was linked to a 27 percent higher risk of developing heart disease. The finding reopens the debate about the potential risks of too much dietary cholesterol.