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;

Effect of work environment and specialty degree of dentists on cross-infection control in COVID-19 pandemic Merve Mutluay; Edibe Egil;

Navigating the waves in Colombia: a cohort study of inpatient care during four COVID-19 waves David E. Rebellón-Sánchez; Tania M. Guzmán; Sarita Rodriguez; Julio Llanos-Torres; Daniela Vinueza; Eric Tafurt; Estefanía Beltrán; Álvaro Martínez; Fernando Rosso;