Scientists have turned to artifacts associated with Leonardo da Vinci on a quest to track down the legendary polymath’s elusive DNA.

Developing new drugs is not for the faint-hearted. “It’s a pretty perilous journey,” says Paul Nioi, vice-president of discovery and translational research at Alnylam Pharmaceuticals. “It’s expensive ...

Since the initial discovery, over a decade and a half ago, that genetically engineered DNA can be delivered in vaccine form and can elicit an immune response, there has been a great deal of progress ...