Coronavirus disease 2019(6) COVID-19(5) severe acute respiratory syndrome coronavirus 2(4) Thoracic surgery.(3) coronavirus(3) pandemic(3) titre(2) BNT162b2 vaccine(2) non-responder(2) inhibitors(2) proportion(2) oral steroid(2) heart(2) Surgical indications(2) predictor(2) Anti-spike(2) recipients(2) recipient(2) mRNA vaccine(2) lack(2) IQR(2) Rapamycin(2) tracheotomy(2) age(2) seropositive(2) acute respiratory syndrome(2) U/mL(2) decrease(2) third dose.(2) Improved(2)