Researchers say COVID-19 survivors may be at greater risk of developing mental health issues than other people. That information comes from a large study published earlier this week. The study found that 20 percent of those infected with the novel coronavirus are diagnosed with a psychiatric disorder within 90 days. Researchers from Britain’s Oxford University studied recovered COVID-19 patients who developed mental health problems. They found that the most common issues were anxiety, depression, and insomnia, the inability to sleep. They also noted a much higher risk of dementia, a condition that weakens the brain.