WHO prequalifies first Ebola vaccine

The World Health Organization (WHO) on Tuesday said it had prequalified an Ebola vaccine for the first time, hailing a “critical step” towards its licensing, access and roll-out in countries most at risk of outbreaks.

Kratom may cause liver damage: study

(HealthDay)—The popular herbal supplement kratom may cause liver damage, researchers warn. Kratom is widely available in smoke shops and online. It’s a botanical product made from Mitragyna speciosa, a tropical evergreen tree found in Southeast