What we can learn about vaccines efficacy from global rollout
Leon Neal/Getty Images Clinical tests from the various Covid-19 vaccine candidates last year offered a first glimmer of hope of a return to normality - but only now can the real-world impact of the jabs be assessed. As countries worldwide race to inoculate populations against the coronavirus, the rollouts are beginning to affect rates of infections and related deaths. Here is what we can learn from the latest data on the main Covid vaccines. 1 Oxford-AstraZeneca vaccine The Oxford-AstraZeneca vaccine appears to cut Covid infections by two-thirds according to the first “real-world dataâ€...