Children and adolescents exhibit a broad range of clinical outcomes from SARS-CoV-2
infection, with the majority having minimal to mild symptoms. Additionally, some succumb to …

Background Duration of humoral and cellular memory in children previously infected SARS-
CoV-2 or vaccinated and subsequent risk of reinfection is still not fully elucidated. Methods …

Almost 2 years into the pandemic and with vaccination of children significantly lagging
behind adults, long-term pediatric humoral immune responses to SARS-CoV-2 are …

Background Persistence of antibodies to SARS-CoV-2 viral infection may depend on several
factors and may be related to the severity of disease or to the different symptoms. Methods …

Background Data regarding humoral and cellular response against SARS-CoV-2 in children
are scarce. We analysed seroconversion rate, decrease of anti-RBD IgG antibodies over …

Background: Data on seroconversion rates after SARS-CoV-2 infection in young children (<
6 years) is scarce. The present study compares seroconversion rates between young …

Background The kinetics and durability of T-cell responses to SARS-CoV-2 in children are
not well-characterized. We studied a cohort of children aged 6 months to 20 years with …

Background: Antibody levels decline a few months post-acute COVID-19, but humoral
memory persists in adults. Age and disease severity may affect antibody responses. This …

SARS-CoV-2 serology may be helpful to retrospectively understand infection dynamics in
specific settings including kindergartens. We assessed SARS-CoV-2 seroprevalence in …

This is a SARS-CoV-2 seroepidemiological study in a pediatric population (0–16 years)
during the BA. 5 Omicron predominance period in the Athens metropolitan area. Serum …