Hiromasa Okayasu

Cluster lot quality assurance sampling: effect of increasing the number of clusters on classification precision and operational feasibility.

Hiromasa Okayasu, Alexandra E Brown, Michael M Nzioki, 2014, The Journal of infectious diseases.

Affordable inactivated poliovirus vaccine: strategies and progress.

Hiromasa Okayasu, Marina Takane, Roland W Sutter, 2014, The Journal of infectious diseases.

Safety and immunogenicity of inactivated poliovirus vaccine based on Sabin strains with and without aluminum hydroxide: a phase I trial in healthy adults.

Hiromasa Okayasu, Roland W Sutter, Wilfried A M Bakker, 2013, Vaccine.