Symptoms can take 6-9 months
Long Covid symptoms including fatigue, difficulty breathing, difficulty concentrating, and trouble sleeping occur in a large fraction of patients and last over 12 months after the initial infection. The most common symptoms occur in 20-45% of patients.
Findings from the 250,000 patients studied suggest that some symptoms become more common over time, first appearing 6-9 months after infection. While there were considerable differences in how the 63 studies analyzed were conducted, Long Covid is now recognized as a complex systemic disease with substantial morbidity.