The WHO seeks more details on the death of a plague research lab employee in Russia

The World Health Organization says it wants more information on what caused the death of an employee at a Russian plague research lab. Russia says the woman died of pneumonia of unknown origin.

<p>The World Health Organization says it wants more information on what caused the death of an employee at a Russian plague research lab. Russia says the woman died of pneumonia of unknown origin.</p><img src='https://media.npr.org/include/images/tracking/npr-rss-pixel.png?story=nx-s1-5993873' />