For many people who contract mild, moderate, or severe COVID-19, the disease's effects don't disappear when the infection fades. A systematic review and meta-analysis published Monday to the journal Scientific Reports found that 80% of cases result in at least one long-term symptom. The authors of the report scoured more than 18,000 publications, seeking studies assessing the long-term effects of COVID-19 with at least 100 subjects. They found fifteen studies, which collectively followed 47,910 patients for as long as 110 days post-infection. They then pooled the data to discern the prevalence of chronic side effects. "The five most common symptoms...