Makoto Mayumi

A Novel DNA Virus (TTV) Associated with Elevated Transaminase Levels in Posttransfusion Hepatitis of Unknown Etiology

Tsutomu Nishizawa, Hiroaki Okamoto, Keiko Konishi et al. · Biochemical and Biophysical Research Communications · 1997 · 1.2K citations

Diagnostic Virology, Molecular Virology, Hepatology +9

Typing Hepatitis B Virus by Homology in Nucleotide Sequence: Comparison of Surface Antigen Subtypes

Hiroaki Okamoto, Fumio Tsuda, Hiroshi Sakugawa et al. · Journal of General Virology · 1988 · 1.1K citations

E Antigen and Anti-E in the Serum of Asymptomatic Carrier Mothers as Indicators of Positive and Negative Transmission of Hepatitis B Virus to Their Infants

Kiyshi Okada, Ichiro Kamiyama, Minako Inomata et al. · New England Journal of Medicine · 1976 · 723 citations

Vaccination, Maternal Immunization, Infectious Disease Prevention +14

Hepatitis B viruses with precore region defects prevail in persistently infected hosts along with seroconversion to the antibody against e antigen

Hiroaki Okamoto, S Yotsumoto, Y. Akahane et al. · Journal of Virology · 1990 · 518 citations · Full text

Vaccination, Viral Replication, Molecular Virology +15

Hepatitis B virus with mutations in the core promoter for an e antigen-negative phenotype in carriers with antibody to e antigen

Hiroaki Okamoto, Fumio Tsuda, Y. Akahane et al. · Journal of Virology · 1994 · 488 citations · Full text

Genetics, Immunology, Hepatitis B +17