CAVALCANTE, Taise; BARBOZA, Waneska; MARTINS-FILHO, Paulo Ricardo. The vaccination status of COVID-19 hospitalized patients during the Omicron BQ.1.1 wave in Northeast Brazil suggests the need for a fifth booster dose in the elderly, with a time since the last dose of more than 6 months . EXCLI Journal, [S. l.], v. 22, p. 169–172, 2023. DOI: 10.17179/excli2023-5807. Disponível em: https://www.excli.de/index.php/excli/article/view/5807. Acesso em: 25 apr. 2024.