Story perspectives

Bioweapons Expert Barbara Hatch Rosenberg Passes at 97

4/21/2026

Summary

Story summary

Barbara Hatch Rosenberg, a molecular biologist and bioweapons expert, died on March 14 at age 97 in Northampton, Massachusetts, confirmed by her stepdaughter Claudia Kellogg.
She co-founded the Federation of American Scientists’ Working Group on Biological and Chemical Weapons.
She advised the Clinton administration during the 2001 anthrax attacks following the September 11, 2001, attacks.
The 2001 attacks caused five deaths and 17 illnesses from mailed anthrax spores.

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Story summary

Barbara Hatch Rosenberg, a molecular biologist and bioweapons expert, died on March 14 at age 97 in Northampton, Massachusetts, confirmed by her stepdaughter Claudia Kellogg.
She co-founded the Federation of American Scientists’ Working Group on Biological and Chemical Weapons.
She advised the Clinton administration during the 2001 anthrax attacks following the September 11, 2001, attacks.
The 2001 attacks caused five deaths and 17 illnesses from mailed anthrax spores.