An NHS Lanarkshire public health consultant is among the experts working on the world’s largest study to determine the impact of exercise on boosting Covid-19 immunity.Dr Jennifer Darnborough is among the group of leading physical activity researchers, respiratory experts and sport and exercise psychologists who are analysing more than 14,000 research papers covering the past four decades to find key data.They are aiming to discover whether exercise and physical activity can increase immunity to the coronavirus, and are working to publish their conclusions by the end of the month to aid government decision-making.It is being led by Glasgow Caledonian University (GCU) and also involves eminent immunologists and epidemiologists from around