P1507: CLINICAL PROFILE OF COVID-19 INFECTION AND IMMUNE RESPONSE AFTER 3AND6 MONTH VACCINATION AGAINST SARS-COV-2 IN ADULT PATIENTS WITH TRANSFUSION-DEPENDENT THALASSAEMIA-THE EXPERIENCE OF A GREEK CENTER. (23rd June 2022) - Delaporta, P.; Terpos, E.; Solomou, E. E.; Gumeni, S.; Chatzielefteriou, M.-I.; Toutoudaki, K.; Kyriakopoulou, D.; Ioakeimidou, N.; Ntanasis-Stathopoulos, I.; Papassotiriou, I.; Trougakos, I. P.; Dimopoulos, M. A.; et al.