Bioweapons Test Fingered in Smallpox Outbreak.

Reports on the reactions of bioterrorism experts in the U.S. to a preliminary report that a 1971 smallpox outbreak in Aralsk, Kazakhstan, was triggered by the Soviet Union's secret testing of a bioweapon at Vozrozhdeniye Island. Number of people affected by the epidemic; Contents of a 1970s official Soviet account of the incident; Arguments against the Soviet report's claim that the outbreak had a natural origin.