Antibody conversion rates to SARS-CoV-2 in saliva from children attending summer schools in Barcelona, Spain - Carlota Dobaño; Selena Alonso; Mariona Fernández de Sevilla; Marta Vidal; Alfons Jiménez; Gemma Pons Tomas; Chenjerai Jairoce; María Melé Casas; Rocío Rubio; María Hernández García; Gemma Ruiz-Olalla; Mònica Girona-Alarcón; et al. (BMC Medicine, 2021)