Viral Infectious Diseases Unit and
Nano Medical Engineering Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan, and

Viral Infectious Diseases Unit and
Nano Medical Engineering Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan, and

Viral Infectious Diseases Unit and
Nano Medical Engineering Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan, and
Bovine Leukemia Virus Vaccine Laboratory, RIKEN Innovation Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

Viral Infectious Diseases Unit and
Nano Medical Engineering Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan, and
Bovine Leukemia Virus Vaccine Laboratory, RIKEN Innovation Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.