RT Journal Article T1 Evaluation of the Kinetics of Antibody Response to COVID-19 Vaccine in Solid Organ Transplant Recipients: The Prospective Multicenter ORCHESTRA Cohort. A1 Giannella, Maddalena A1 Righi, Elda A1 Pascale, Renato A1 Rinaldi, Matteo A1 Caroccia, Natascia A1 Gamberini, Chiara A1 Palacios-Baena, Zaira R A1 Caponcello, Giulia A1 Morelli, Maria Cristina A1 Tamè, Mariarosa A1 Busutti, Marco A1 Comai, Giorgia A1 Potena, Luciano A1 Salvaterra, Elena A1 Feltrin, Giuseppe A1 Cillo, Umberto A1 Gerosa, Gino A1 Cananzi, Mara A1 Piano, Salvatore A1 Benetti, Elisa A1 Burra, Patrizia A1 Loy, Monica A1 Furian, Lucrezia A1 Zaza, Gianluigi A1 Onorati, Francesco A1 Carraro, Amedeo A1 Gastaldon, Fiorella A1 Nordio, Maurizio A1 Kumar-Singh, Samir A1 Abedini, Mahsa A1 Boffetta, Paolo A1 Rodríguez-Baño, Jesús A1 Lazzarotto, Tiziana A1 Viale, Pierluigi A1 Tacconelli, Evelina A1 On Behalf Of The Orchestra Study Group Workpackage, K1 COVID-19 K1 antibody response K1 mRNA vaccines K1 serology K1 solid organ transplantation AB Previous studies assessing the antibody response (AbR) to mRNA COVID-19 vaccines in solid organ transplant (SOT) recipients are limited by short follow-up, hampering the analysis of AbR kinetics. We present the ORCHESTRA SOT recipients cohort assessed for AbR at first dose (t0), second dose (t1), and within 3 ± 1 month (t2) after the first dose. We analyzed 1062 SOT patients (kidney, 63.7%; liver, 17.4%; heart, 16.7%; and lung, 2.5%) and 5045 health care workers (HCWs). The AbR rates in the SOTs and HCWs were 52.3% and 99.4%. The antibody levels were significantly higher in the HCWs than in the SOTs (p SN 2076-2607 YR 2022 FD 2022-05-12 LK http://hdl.handle.net/10668/21436 UL http://hdl.handle.net/10668/21436 LA en DS RISalud RD Apr 10, 2025