email article Nearly one in four COVID-19 patients with olfactory dysfunction said they did not recover their sense of smell 60 days after losing it, a large prospective study in Europe showed. Among nearly 2,600 people with confirmed SARS-CoV-2 infection, patient-reported prevalence of olfactory dysfunction was 85.9% in mild COVID-19 cases, 4.5% in moderate cases, and 6.9% in severe-to-critical cases, reported Jerome Lechien, MD, PhD, of Paris Saclay University in France, and co-authors in the About 24% of patients did not subjectively recover olfaction 60 days after dysfunction started. When a smaller sample of patients was evaluated with objective olfactory tests, 15.3% still showed deficiency at 60 days and 4.7% had not recovered olfaction at 6 months.