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The designation is intended to attract more research and funding for curbing the disease, also known as cancrum oris and gangrenous stomatitis.

The second shot used another virus, called vesicular stomatitis virus.

She made nearly 950 changes, hoping to modify the coronavirus gene just enough to take the place of a similar gene belonging to a benign virus: the vesicular stomatitis virus, or VSV.

Theodora Hatziioannou and Paul Bieniasz at the Rockefeller University in New York City and their colleagues engineered a version of the vesicular stomatitis virus, which infects livestock, to make the spike protein.

State Veterinarian Samantha Beaty said in a news release that vesicular stomatitis virus, or VSV, has not yet entered Tennessee, but it has sickened livestock in Arkansas, Kansas, Missouri, Nebraska, and Oklahoma.