Cavalcante, Taise, Waneska Barboza, and Paulo Ricardo Martins-Filho. “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 22 (February 1, 2023): 169–172. Accessed April 19, 2024. https://www.excli.de/index.php/excli/article/view/5807.