How Russia and the world are responding to a possible case of pneumonic plague after lab worker death

The World Health Organization says a possible case of pneumonic plague in Russia presents a "very low" risk outside the country as investigators look into what caused the death of a lab employee there last week.

The World Health Organization says a possible case of pneumonic plague in Russia presents a "very low" risk outside the country as investigators look into what caused the death of a lab employee there last week.