A case of SARS-CoV-2 Omicron reinfection resulting in a significant immunity boost in a paediatric patient affected by B-cell acute lymphoblastic leukemia

Table 1 Demographic and clinical characteristics

Demographic characteristics
Age	Gender	Origin	Comorbidities	SARS-CoV-2 Vaccination
5	Male	Caucasian	B-cell acute lymphoblastic leukemia in reinduction	No

Clinical characteristics
	First infection	Second infection
First positivity	30/12/2021	14/03/2022
Nasopharyngeal swab sample date	04/01/2022	14/03/2022
Length of SARS-CoV-2 positivity	30 days	15 days
Fever	+	+
COVID-19 definition
Asymptomatic	−	−
Mild^a	+	+
Moderate/severe^b	−	−

^aIncluding: symptoms of upper respiratory airways (cough, sore throat, runny nose, sneezing, rhinitis, pharyngo-adenitis, laryngitis)
^bIncluding: symptoms of lower respiratory airways (pneumonia, bronchitis and bronchiolitis)

ISSN: 1471-2334