Table 1.

Difference in MIS-C diagnostics criteria between the Royal College of Paediatrics and Child Health (RCPCH), CDC, and the World Health Organization (WHO).

Differences	RCPCH	CDC	WHO
Name	PIMS-temporally associated with COVID-19	MIS-C	MIS-C
Length of fever	Not specified	≥24 hours	≥3 days
Age	Child	<21 years	0 to 19 years
Evidence of inflammation	Yes	Yes	Yes
Multisystem involvement	Single organ or multisystem	≥2 systems involved	≥2 systems involved
Exclude other causes	Yes	Yes	Yes
SARS-CoV-2-PCR or antibody or exposure	Not necessary	Necessary	Necessary

MIS-C, multisystem inflammatory syndrome in children; PIMS, Paediatric inflammatory multisystem syndrome; SARS-CoV-2, COVID19; PCR, Polymerase Chain Reaction.