Abstract

The number of children infected with the 2019 novel coronavirus disease caused by severe acute respiratory syndrome coronavirus surged amid the outbreak of the Omicron strain. Dengue fever has been reported in severe cases of COVID-19 and in children and neonates with multisystem inflammatory syndrome. Dengue fever is recognized as one of the manifestations of MIS, but so far there have been few overview reports. We retrospectively analyzed four infants younger than 3 months with infection who were treated at our institution during the outbreak of the Omicron strain. Most of the patients were in good condition, but dengue fever was observed in all four cases. Dengue fever may also be observed in infant patients with mild symptoms. The clinical course should be carefully monitored and the patient should be monitored.