考研英语阅读篇章美国发现被遗忘的瓶装天花病毒
The vials were subsequently transported to a secure facility in Atlanta, Georgia, on 7 July.
Tests will be conducted on the material to determine if it is viable before it destroyed, the CDC said.
The virus may remain deadly even after freeze-drying, though is it typically kept cold to remain alive.
The CDC also notified the World Health Organization of the discovery. The WHO currently oversees two designated repositories for smallpox; one in Atlanta as well as one in Novosibirsk, Russia.
It is the not the first time vials of smallpox have been unexpectedly discovered. Several were found at the bottom of a freezer in Eastern Europe in the 1990s, according to media reports.
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