Ukraine’s government wants to restore the country’s frontier to where it was before Russia launched its first invasion more than a decade ago. The U.S. defense secretary said that was “unrealistic.” ...

Crimean–Congo hemorrhagic fever (CCHF) caused by the CCHF virus, a member of the family Bunyaviridae, genus Nairovirus, is a tick-borne acute viral hemorrhagic fever with a high case–fatality ...

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