BackgroundMany patients with COVID-19 do not require hospitalisation, let alone have undergone COVID-19 testing. There is anecdotal evidence that patients with “mild” COVID-19 may complain about persistent symptoms, even weeks after the infection. This suggests that symptoms during the infection may not resolve spontaneously. The objective of this study was to assess whether multiple relevant symptoms recover following the onset of symptoms in hospitalised and non-hospitalised patients with COVID-19.Methods2113 members of two Facebook groups for coronavirus patients with persistent complaints in The Netherlands and Belgium, and from a panel of people who registered at a website of the Lung Foundation Netherlands, were assessed for demographics, pre-existing comorbidities, health status, date of symptoms onset, COVID-19 diagnosis, healthcare utilisation, and the presence of 29 symptoms at the time of the onset of symptoms (retrospectively) and at follow-up (79±17 days after symptoms onset).Results112 hospitalised patients and 2001 non-hospitalised patients (confirmed COVID-19, n=345; symptom-based COVID-19, n=882; and suspected COVID-19, n=774) were analysed. The median number of symptoms during the infection reduced significantly over time (14 (11–17) versus6 (4–9), p<0.001). Fatigue and dyspnoea were the most prevalent symptoms during the infection and at follow-up (fatigue: 95% versus 87%; dyspnoea: 90% versus 71%).ConclusionIn previously hospitalised and non-hospitalised patients with confirmed or suspected COVID-19, multiple symptoms are present about 3 months after symptoms onset. This suggests the presence of a “post-COVID-19 syndrome” and highlights the unmet healthcare needs in a subgroup of patients with “mild” or “severe” COVID-19.

BackgroundIt remains unknown whether and to what extent members of online long COVID-19 peer support groups remain symptomatic and limited over time. Therefore, we aimed to evaluate symptoms in members of online long COVID-19 peer support groups up to 6 months after the onset of COVID-19-related symptoms.MethodsDemographics, symptoms, health status, work productivity, functional status and health-related quality of life were assessed about 3 and 6 months after the onset of COVID-19-related symptoms in members of online long COVID-19 peer support groups.ResultsData of 239 patients with a confirmed COVID-19 diagnosis (83% women; median (IQR) age: 50 (39–56) years) were analysed. During the infection, a median (IQR) of 15 (11–18) symptoms was reported, which was significantly lower 3 and 6 months later: 6 (4–9) and 6 (3–8), respectively (p<0.05). From 3 to 6 months follow-up, the proportion of patients without symptoms increased from 1.3% to only 5.4% (p<0.001). Patients also reported a significantly improved work productivity (work absenteeism and presenteeism: 73% versus 52% and 66% versus 60%), self-reported good health (9.2% versus 16.7%), functional status (Post COVID-19 Functional Status scale: 2.4 (0.9) versus 2.2 (0.8)) and health-related quality of life (all p<0.05).ConclusionAlthough patients with confirmed COVID-19, who were all members of online long COVID-19 peer support groups, reported significant improvements in work productivity, functional status and quality of life between 3 and 6 months follow up, these data clearly highlight the long-term impact of COVID-19, as approximately 6 months after the onset of COVID-19-related symptoms a large proportion still experienced persistent symptoms, a moderate-to-poor health, moderate to severe functional limitations, considerable loss in work productivity, and/or an impaired quality of life. Action is needed to improve the management and healthcare of these patients.