Data extraction
The following variables were extracted from the appropriate articles:
first author, publication date, type of study, geographical regions,
study language, number of SARS-CoV-2 confirmed patients, total
influenza, influenza A, influenza B, co-infected patients with clinical
characterization (fever, cough, fatigue, diarrhea, difficult breathing),
radiological data (Chest CT). The information preparation was done in
Microsoft excel spreadsheet and all statistical analyses were carried
out via Comprehensive Meta Analysis V.2 software.