Variation in SARS-CoV-2 seroprevalence in children in the region of Asturias, Northern Spain.

"Declarations Conflict of interestThe authors declare no conflict of interest. Non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article. Ethical approvalThis study was conducted in accordance with the 1964 Declaration of Helsinki and its subsequent amendments. It was approved by the Asturian Research Ethics Committee (2020–315). Written informed consent was obtained from parents of participating children. Children aged 12 and older could confirm the consent themselves. Participants were free to decline consent at any time. Conflict of interest The authors declare no conflict of interest. Non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article."

"Funding Elisa García-García received partial financial support from Fundación Ernesto Sánchez Villares, Sociedad de Pediatría de Asturias, Cantabria y Castilla y León (SCCALP; grant number 2021/02). The remaining authors received no external funding."