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Prevalence of persistent symptoms.
A: Distribution of persistent symptoms according to the number of initial symptoms (0-3: n = 96; 4-7: n = 198; >7: n = 22)
B: Distribution of persistent symptoms according to the severity of acute COVID-19 (no oxygen: n = 39; ward patients: n = 135 patients; ICU patients: n = 142).
Abbreviations: ICU: intensive care unit.
