2019-20 coronavirus outbreak medicine.medical_specialty Coronavirus disease 2019 (COVID-19) SARS-CoV-2 business.industry Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) MEDLINE COVID-19 Hematology Pediatrics Clinical Practice Immunocompromised Host Oncology Neoplasms Practice Guidelines as Topic Pediatrics, Perinatology and Child Health Humans Medicine Pediatrics, Perinatology, and Child Health Child business Intensive care medicine Letter to the Editor