Update on the latest global research into Covid-19 with BBC Health Reporter Smitha Mundasad and Claudia talks to the authors of a new study charting brain development over the human life span. Could this be a useful tool to understanding how the brain varies over populations and over time and what are the ethical questions involved?

Plus if you carry excess weight, what difference does it make to your health if those extra kgs are round your waist or hips?

Presenter: Claudia Hammond
Producer: Erika Wright

(Picture: Neurologists working with CT brain scan images in a laboratory. Photo credit: Gorodenkoff/Getty Images.)