Table 2. Clinical presentation of the included cases.

Reference	Covid-19 test/results	Clinical manifestations	Comorbidities
Capone et al.,[12]	All patients had evidence of SARS-CoV-2 infection (+ serology in 91%),	Median of 4 days' fever, 97% had gastrointestinal symptoms & involvement of other organ system, 64% had symptoms fulfilling complete criteria of KD, 76% of patients complete KD criteria had shock (n=16). Myocardial dysfunction (58%)	Overweight	2	6
			Obesity	12	39
Whittaker et al.,[13]	In total 78% had evidence of current or prior SARS-CoV-2, infection PCR + in 26%, SARS-CoV- IgG + 83%	All patients had fever 3-19 days, 10% sore throat, 26% headache, vomiting 45%, abdominal pain 53%, diarrhea 52%, erythematous rash 52%, conjunctival injection 45%, respiratory symptoms 21%, lymphadenopathy 16%, swollen hands & feet 16%, mucous membrane changes and red cracked lips 29%	Asthma	3	5.2
			Neuro-disability	1	1.7
			Sickle-cell trait	1	1.7
			Alopecia	1	1.7
Dufort et al.,[14]	96% were classified as having a confirmed case and 4% having a suspected case. 24% had a COVID-19 compatible illness a median of 21 days before hospitalization, 38% had exposure to a person with confirmed COVID-19 like illness, 22% had direct contact with a person who had a clinically compatible COVID-19 like illness PCR + 51%, Serology + 99%	All presented with subjective fever or chills, 63% had fever on admission, 97% had tachycardia,78% had tachypnea, 32% hypotension 80% had GI symptoms, 60% had rash, 56% had conjunctival injection, 27% had mucosal changes, (Dermatologic 62%, mucucutaneous 61%), lower respiratory 40%, 61% had GI and either dermatologic or mucocutaneous symptoms	Obesity	29	80.5
Pouletty et al.,[15]	SARS-COVID was detected in 11 (96%). 31% (5 ) cases had documented recent contact with a quantitative PCR-positive individual PCR + 69%, Serology + 87%	44% cardiac involvement Fever (100%) Respiratory signs 2 (12%) Gastrointestinal signs 13 (81%) Neurological signs 9 (56%)Skin rash 13 (81%) Hands and feet erythema/oedema 11 (68%) Conjunctivitis 15 (94%) Dry cracked lips 14 (87%) Cervical lymphadenopathy 6 (37%) Hemodynamic failure 11 (69%) Complete Kawasaki disease: 10 (62%) Kawasaki disease shock syndrome 7 (44%)	Overweight	4	25
			Asthma	2	12.5
Belhadjer et al.,[16]	88% patients tested positive for SARS CoV-2 infection PCR +40% Serology + 86%	All children presented with fever and asthenia, gastrointestinal symptoms were prominent 80%, left ventricular ejection fraction less than 30% in one third	Overweight	6	17
			Asthma	3	8.5
			Lupus	1	3
Toubiana et al.,[17]	90% had evidence of recent SARS-CoV-2 infection detected IgG antibodies against SARS-CoV-2. Two patients were negative. PCR +38% Serology +90%	52% presented with KD complete criteria syndrome, polymorphous skin rash 76%, 76% conjunctivitis injection 81% myocarditis. All had noticeable GI symptoms (abdominal pain, vomiting, and diarrhea) 95%, irritability 57%. 29% headache confusion, meningeal irritation. Pericardial effusion 48%. LVF 10%-57%.	NA
Verdoni et al.,[18]	PCR +20% Serology +80%	Five (50%) of 10 patients were diagnosed with incomplete Kawasaki disease, presenting with three or fewer clinical criteria associated with additional laboratory criteria (n=1) or an abnormal echocardiography (n=4). In these patients, echocardiography revealed left ventricular function depression, mitral valve regurgitation, and pericardial effusion; they also required inotropic support. Chest x-ray, done in all patients in group 2, was positive in five (50%) patients for minimal mono or bilateral infiltrates. Five (50%) of 10 patients in group 2 met the criteria for KDSS because of hypotension and clinical signs of hypoperfusion. Two (20%) patients had diarrhoea and meningeal signs, four (40%) had only diarrhoea, and two (20%) had only meningeal signs.	NA