Missing details keep U.S. plague response on hold
Two big unknowns stand in the way of determining how serious the plague threat in Russia is and whether travel advisories, restrictions at U.S. ports of entry or other precautions are warranted. We still don't know which pathogen killed a Russian researcher, or how well contained it is.Why it matter
<p>Two big unknowns stand in the way of determining how serious the plague threat in Russia is and whether travel advisories, restrictions at U.S. ports of entry or other precautions are warranted. We still don't know which pathogen killed a Russian researcher, or how well contained it is.Why it matter</p>