Many Covid-19 survivors are likely to be at greater risk of developing mental illness, psychiatrists said on Monday, after a large study found 20 percent of those infected with the coronavirus are diagnosed with a psychiatric disorder within 90 days.

Anxiety, depression and insomnia were most common among recovered Covid-19 patients in the study who developed mental health problems. The researchers from Britain's Oxford University also found significantly higher risks of dementia, a brain impairment condition...