Heterologous Ad.26.COV2.S versus homologous BNT162b2/mRNA-1273 as a third dose in solid organ transplant recipients seronegative after two-dose mRNA vaccination

Teresa Po‐Yu Chiang, Jennifer L. Alejo, Jonathan Mitchell, Jake D. Kim, Aura T. Abedon, Andrew H. Karaba, Letitia Thomas, Macey L. Levan, Jacqueline Garonzik‐Wang, Robin K. Avery, Andrew Pekosz, William Clarke, Daniel Warren, Aaron A.R. Tobian, Allan B. Massie, Dorry L. Segev, William A. Werbel