 The study found that mild COVID-19 cases had fewer symptoms than those with moderate or severe disease, such as anosmia, dyspnea, and fatigue. Additionally, females were more likely to experience persistent symptoms. Pulmonary function tests revealed decreased lung function in more severe cases, with a significant difference between the mild and severe groups. This article was authored by Samuel Jenzer, Peter Jacquebeck, Milan Sova, and others.