In other reports, lung disorders and congenital heart disease were the common underlying conditions.26,27 A history of asthma was found in only one patient in our study, whereas in some reports, simultaneous history of asthma has been suggested as a risk factor for COVID-19 occurrence and severity.28-30 Among the common symptoms, the most prevalent presentations were fever and cough, similar to the literature.22-25,31 In laboratory parameters, in our sample, the two prominent laboratory findings were leukocytosis and high CRP level. This evidence concerns the gene CRP and congenital heart disease.