Martins-Filho, Paulo Ricardo, Universidade Federal de Sergipe, Hospital Universitário, Laboratório de Patologia Investigativa. Rua Cláudio Batista, s/n. Sanatório. Aracaju, Sergipe, Brasil. CEP: 49060-100. E-mail: prmartinsfh@gmail.com, Brazil

• EXCLI Journal Vol. 22 (2023) - Letters to the editor
  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
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• EXCLI Journal Vol. 20 (2021) - Letters to the editor
  Is there a bidirectional interaction between periodontitis and the severity of SARS-CoV-2 infection?
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