Two US-based scientists were awarded this year’s Nobel Prize in Physiology or Medicine for their work in pioneering key discoveries that enabled the success of mRNA vaccines that were widely deployed against the Covid-19 pandemic.

They are the Hungarian-born biochemist Katalin Karikó and the US-born immunologist Dr Drew Weissman, who were colleagues at the University of Pennsylvania when they published their seminal paper in 2005.

In its press release, the Nobel Assembly at Karolinska Institutet said...