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Among the study participants were 81 patients who tested positive for COVID-19 antibodies and 18 healthy children with negative antibody results. Late presenting symptoms, in descending order of frequency, included cough (852%), shortness of breath (778%), and chest pain (605%). Among patients examined with LUS, 667% displayed 2 or fewer B-lines, 333% displayed 3 or more B-lines, and Z-lines were seen in 99% of cases. Comparative analysis of these parameters revealed no significant difference between the con