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Adjusted predicted probability of positive neutralizing antibody test over time according to site of acute care. Rates of positive antibody test against SARS-CoV-2 remained high up to 13 months post-COVID-19. Patients treated in the hospital had significant higher rates of positive results compared to those who were managed in the outpatient setting. There were no significant differences among patients treated in the emergency department or managed as outpatients for acute COVID-19.
