Ongoing monitoring of the serological status of children is important, particularly in the context of new variants of concern, low vaccine coverage, and low uptake of testing. Here, members of the CITF Secretariat summarize results from the four presentations given during the breakout session, “Seroprevalence and effects of COVID-19 on children and adolescents,” at the CITF Scientific Meeting in Vancouver, March 8-10, 2023.