The news: There have been increasing numbers of anecdotal reports of a link between surviving covid-19 and developing mental health problems in recent months. Now we have some numbers to back those reports up. A new study, published in Lancet Psychiatry, has found that almost one in five people who have had covid-19 go on to be diagnosed with a mental illness within three months of testing positive. 

How the calculations were made: The researchers from Oxford University and NIHR Oxford Health Biomedical Research Centre gathered the electronic health records of 70 million patients in the US, including 62,354