pressure situation

Swine Flu Vaccine Poses Challenges To FDA

NPR Programs: Morning Edition  Thu, 07/23/2009 - 6:34am

As manufacturers start to roll out vaccines against the new H1N1 swine flu, the Food and Drug Administration will only have weeks to decide whether they're safe.

It's a high-pressure situation, complicated by the memory of a flu-vaccine scare in 1976, and by a new ingredient that some manufacturers are experimenting with.