Time	Event
30 April	First dose of coronavirus disease 2019 (COVID-19) vaccine.
21 May	Second dose of COVID-19 vaccine.
22 May	Fever, headache, appetite loss, general malaise, and shoulder stiffness, which was treated with acetaminophen.
23 May	Onset of chest pain and persistent fever, headache, and appetite loss.
24 May	The patient visited outpatient clinic and was admitted to the high care unit; elevated markers of myocardial damage such as high-sensitivity troponin I, creatine kinase, C-reactive protein, and diffuse ST-segment elevation on electrocardiogram (ECG). An urgent coronary angiogram showed no significant stenosis. Anti-inflammatory drugs were started and the patient’s symptoms improved.
25–26 May	The patient was haemodynamically stable and asymptomatic. A subsequent ECG showed partial resolution of the ST changes and a trend towards improvement.
27 May	The patient was discharged in order to perform cardiac magnetic resonance imaging (MRI).
31 May	The patient visited the outpatient clinic with mild general fatigue. Cardiac MRI showed myocardial late gadolinium enhancement with epicardial predominance in the antero-septal, inferior and lateral walls of the basal segment and apex, which were consistent with acute myocarditis.
3 June	The patient recovered and returned to work.
14 June	Despite no deterioration in cardiac function, the patient complained of appetite loss and fatigue on exertion, was diagnosed as post-vaccination syndrome and was absent from work for a month.
12 July	The patient recovered to some extent and returned to work.
29 July	The patient complained of general malaise and sleep disturbance, was diagnosed as depressive state and is currently on leave.