Sequencing and mutations analysis of the first recorded SARS-CoV-2 Omicron variant during the fourth wave of pandemic in Iraq Jivan Qasim Ahmed; Sazan Qader Maulud; Rawand Al-Qadi; Teroj Abdulrahman Mohamed; Gahin Abdulraheem Tayib; Akheenk Mustafa Hassan; Luqman Saleh Taha; Khairi Mohammed Qasim; Mohammed Abid Tawfeeq;

SARS-CoV-2 sublineages recovered from southern Brazilian cases during Omicron wave in 2023, early introduction of JN.1 Mellanie Fontes-Dutra; Micheli Filippi; Meriane Demoliner; Alexandre Sita; Fernando Rosado Spilki;

COVID-19 hospitalization in vaccinated and non-vaccinated patients: Clinical profile and outcomes Laura Holtman-Ferreira; Elessandra de Souza Bitencourt; Betina Mendez de Alcantara Gabardo; Susanne Edinger Pereira; Francine Teixeira; Diego da Silva Magatão; Vitor Loureiro Dias; Ricardo Petterle; Meri Bordignon Nogueira; Sonia Mara Raboni;