In January 2026, "Microorganisms" published an article, "Unveiling the Hidden Reservoir: High Prevalence of Occult Hepatitis B and Associated Surface Gene Mutations in a Healthy Vietnamese Adult Cohort," prepared with the participation of scientists from the Pasteur Research Institute of Epidemiology and Microbiology in St. Petersburg (Yu. V. Ostankova, A.N. Shchemelev, E.N. Serikova, V.S. Davydenko, and A.A. Totolyan).