Michiaki Takahashi
Michiaki Takahashi (高橋 理明, Takahashi Michiaki; February 17, 1928 – December 16, 2013) was a Japanese virologist, best known for inventing the first chickenpox vaccine. He developed the "Oka" vaccine by producing v-Oka, a live-attenuated virus strain of varicella zoster virus.