Unprecedented levels of stress caused by social isolation during the Covid-19 pandemic may have led to a “ massive ” increase in cases of anxiety and depression, global health leaders have said.A new report from the World Health Organisation estimated that in the first year of the Covid-19 pandemic, the global prevalence of anxiety and depression increased by more than 25%. The review found that women were more affected than men, and younger people – especially those aged between 20 and 24 – wer