Coronavirus testing is ‘the gateway to prevention at an individual level’ – Prof Christophe Fraser

We spoke to Professor Julian Peto a statistician and epidemiologist at the London School of Hygiene and Tropical Medicine, who advised constant widespread testing of the whole population in April, and Christophe Fraser, a professor of pathogen dynamics at the University of Oxford and part of its Big Data Institute. He is also a scientific advisor to the government’s Test and Trace programme.