Time	Events
3 February 2020	Percutaneous ventricular septal defect closure
25 March 2020	Hospital admission due to bronchiolitis
29 March 2020	Discharged home
13 May 2020	The patient had shortness of breath, fever, cough, vomiting, and poor oral intake
15 May 2020 4:00	Presentation to the emergency department due to respiratory failure. The patient was suspected of coronavirus disease 2019. A swab test was performed to confirm the diagnosis. He had anaemia, elevated inflammatory markers, and high cardiac enzyme levels. Chest radiography revealed bilateral ground-glass opacities.
15 May 2020 7:00	The patient required mechanical ventilation for rapidly progressing respiratory failure. He was transferred to the paediatric intensive care unit. Inotropic support was started.
16 May 2020	Reverse transcription polymerase chain reaction confirmed the diagnosis of coronavirus disease 2019. Treatment with hydroxychloroquine, azithromycin, and tocilizumab was initiated. Intravenous immunoglobulin was also administered.
16–19 May 2020	The patient presented with multi-organ dysfunction. High-frequency oscillatory ventilation and vasopressors were continuously administered.
20 May 2020	The patient experienced worsening shock, refractory hypoxaemia, and cardiac arrest, and eventually died.