Stability of hybrid versus vaccine immunity against BA.5 infection over 8 months. Issue 2 (February 2023) - Malato, João; Ribeiro, Ruy M; Fernandes, Eugénia; Leite, Pedro Pinto; Casaca, Pedro; Antunes, Carlos; Fonseca, Válter R; Gomes, Manuel Carmo; Graca, Luis