Farage has described lockdown as "cruel and unnecessary" and endorsed the Great Barrington Declaration, which advocates focused protection of those most vulnerable to COVID-19 with the majority of the population allowed to resume normal life. The approach was conceived by Sunetra Gupta, a professor of theoretical epidemiology at the University of Oxford, as well as Jay Bhattacharya of Stanford University and Martin Kulldorff of Harvard University. The scientists were concerned with lockdown's effects on public health and mental health, especially for the underprivileged, which they described as "devastating". However, the approach has been criticised by Tedros Adhanom, the director-general of the World Health Organization, and Robert Lechler, the president of the British Academy of Medical Sciences.