Concerning the neurological system, the most frequent symptoms included fever (64.6%), fatigue (29.4%), headache (11.1%), and muscle soreness (18.7%).
An overview of 102 systematic reviews identified that the most prevalent respiratory symptoms related to COVID-19 were cough (53.6%), expectoration (23.4%), dyspnea (19.8%), and sore throat (12.4%). Concerning the neurological system, the most frequent symptoms included fever (64.6%), fatigue (29.4%), headache (11.1%), and muscle soreness (18.7%). Gastrointestinal symptoms associated with COVID-19 encompassed anorexia (12.9%), diarrhea (8.1%), nausea (6.7%), vomiting (5.5%), and constipation (5.5%)12.