US adults reinfected with SARS-CoV-2 may be at a 35% greater risk for long COVID than those with one-time infections, a team led by the independent research institute RTI International posted last week on the preprint server medRxiv. For the observational, non–peer-reviewed study, investigators examined the electronic health records of the COVID-19 cohort of the National Clinical Cohort Collaborative, part of …
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