Fig. 2
From: Cough and sputum in long COVID are associated with severe acute COVID-19: a Japanese cohort study
Assessment of prolonged cough and sputum thorough follow-up periods. (A) Prevalence of cough and sputum symptoms over time at each time point in patients who completed during follow-up. (B) Prevalence of cough with or without sputum (wet cough or dry cough, respectively) in patients who reported prolonged cough. C: Prevalence of sputum with or without cough in patients who reported prolonged sputum