Clinical and Laboratory Comparison of Covid-19 and Influenza A/B in Children.

Abstract

The clinical picture of COVID-19 shows significant similarity with influenza. In this study, it was aimed to compare the clinical and laboratory findings between pediatric patients diagnosed with COVID-19 and those with influenza A or B, and to obtain data on the differential diagnosis of COVID-19 from influenza in children. The study included 104 patients with COVID-19, 140 patients with influenza A and 135 patients with in-fluenza B (379 patients in total) who were admitted to our tertiary hospital with symptoms of acute respiratory tract infection. Fever, cough, runny nose, and pharyngeal hyperemia rates were significantly lower in patients with COVID-19 than in those with influenza A/B. The highest leukocytosis and lymphocytosis rates were seen in influenza A patients. Eosinophil levels were found significantly lower in the influenza A/B patients compared to the COVID-19 group. C-reactive protein levels were significantly higher in the influenza A/B group when compared with the COVID-19 group. The mean PDW value was significantly higher in the COVID-19 patients compared to influenza A/B. Our study data show that low body temperature and loss of taste and smell support the diagnosis of COVID-19, and fever, cough, pharyngeal hyperemia, and runny nose support the diagnosis of influenza. While leukocytosis and increased C-reactive protein suggest influenza, high PDW and eosinophil levels support COVID-19.