New York, April 16 -- A lack of new treatments for common infections has left people dangerously exposed to the "world's most dangerous bacteria", the UN health agency said on Thursday.

The alert from the World Health Organization (WHO) is delivered in a report showing that none of the 43 antibiotics in development today sufficiently addresses the growing threat posed by 13 priority drug-resistant bacteria.

"The persistent failure to develop, manufacture, and distribute effective new antibiotics is further fuelling the impact of antimicrobial resistance and threatens our ability to successfully treat bacterial infections," said Dr. Hanan Balkhy, WHO Assistant Director General on antimicrobial resistance.

Those most at risk are young ch...