By Douglas Holtz-Eakin
The young drop coverage to avoid higher premiums
New tests that promise to speed up diagnosis of food poisoning pose an unexpected problem: They could make it more difficult to identify dangerous outbreaks like the one that sickened people who ate a variety of Trader Joe's peanut butter this fall.

It's about to get faster and easier to diagnose food poisoning, but that progress for individual patients comes with a downside: It could hurt the nation's ability to spot and solve dangerous outbreaks.