Strides in Biodefense Follow 2001 Anthrax Scare

Anthrax-laced letters that killed five people, targeted U.S. senators and paralyzed post offices a decade ago have reshaped the nation’s biodefenses.

While confidence is higher that the United States is better protected, there are continuing worries about potential threats in the coming era of “synthetic biology,” man-made designer microbes.

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