Dr. Hossain completed his bachelor degree, Doctor of Veterinary Medicine (DVM) (2010) and Master of Science (MS) in Microbiology (2012) from the Bangladesh Agricultural University, Bangladesh. He started to conduct virus related research during his MS study. However, he conducted research on Newcastle disease virus (NDV) isolation, characterization and vaccine strain development in the contest of Bangladesh. He joined as a Lecturer in the department of Microbiology and Hygiene, Bangladesh Agricultural University at January, 2012. He has been selected as a MEXT scholar by the Japanese government for his PhD degree at 2013. He came to Osaka University Graduate School of Medicine, Japan at October 2013 as a research student under the supervision of Professor Dr. Keiji Ueda (Division Virology, Department of Microbiology and Immunology). Then he completed his PhD (Virology) at March, 2018 from same lab and the mentor was Professor Dr. Ueda. Currently, he is working as a postdoctoral researcher over there. During his research studentship, PhD course and postdoctoral research, he focused on Hepatitis B virus mutations affecting viral replication, antigenicity, immunogenicity, and diagnostic & vaccination failure. Furthermore, He is also conducting research to find out the host cellular factors affecting HBV & KSHV replication and KSHV latency & lytic phase.