Vaccinated COVID-19 Index Cases Are Less Likely to Transmit SARS-CoV-2 to Their Household Contacts: A Cohort Study oleh Pere Godoy, Iván Martínez-Baz, Ignasi Parron, Manuel García-Cenoz, Joaquim Ferras, Mònica Carol, Nuria Bes, Montserrat Guillaumes, Sofia Godoy, Diana Toledo, Núria Follia, Carme Miret, Jessica Pardos, Miquel Alsedà, Pedro Plans-Rubio, Inma Sanz, Maria-Rosa Sala, Joan A. Caylà, Jacobo Mendioroz, Carmen Muñoz-Almagro, Jesús Castilla, Ángela Domínguez, on behalf of the SARS-CoV-2 Transmission to Household Contacts Working Group