Preventing COVID-19 infection in pediatric patients with hematological disease and cancer is important. Thus, patients and those around them should avoid crowds, wear masks, and perform hand hygiene. It is necessary to try to prevent nosocomial infections during hospitalization. Moreover, determining COVID-19 complications and the condition of patients with hematological disease and cancer, and determining a personalized treatment strategy that prioritizes the treatment of high-risk conditions

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... s necessary when suffering from COVID-19. However, another problem is when the patient refrains from visiting a medical institution due to the fear of contracting COVID-19 infection and becomes seriously ill. Furthermore, the lack of medical resources has affected the treatment of pediatric patients with hematological disease and cancer (e.g., delays and changes in treatment). Thus, appropriate information needs to be provided to children and their parents so that preventive measures can be taken.