Coronavirus - new variants

The virus which causes Covid 19 is continuing to evolve, but into several different closely related strains rather than more new variants such as Delta and Omicron. Ravi Gupta, Professor of Clinical Microbiology at Cambridge university gives us his assessment of the current picture, and Jeremy Farrar, Director of the Welcome Trust, comments on global efforts to counter the virus.The Nobel prizes were awarded this week. Science Journalist Philip Ball looks at the winning discoveries and the scientists behind them.And shortlisted for the Royal Society Insight Investment Science book prize, we hear from Henry Gee, author of A Very Short History of Life on Earth.