Vaccine chronicle in Japan

Area of Science:

• Immunization and vaccine development in Japan.

Background:

• Immunization in Japan began in 1849 with Jenner's cowpox vaccine.
• Current immunization law established in 1948, with key amendments in 1976 (adverse event compensation) and 1994 (private vaccination).
• A 1992 court decision on governmental responsibility for vaccine-associated adverse events impacted vaccine development.

Purpose of the Study:

• To review Japan's immunization strategies and vaccine development.
• To discuss future vaccine concerns in the Japanese context.

Main Methods:

• Review of historical immunization laws and amendments in Japan.
• Analysis of vaccine availability, distinguishing between universal and voluntary vaccines.
• Discussion of vaccine development trends and future challenges.

Main Results:

• In 2010, many universal vaccines became recommended, but some, like mumps, zoster, hepatitis B, and rota vaccines, remain voluntary.
• Vaccine development faced stagnation due to legal precedents regarding adverse events.

Conclusions:

• Japan's immunization landscape has evolved significantly, influenced by legal and policy changes.
• A distinction persists between universally recommended and voluntary vaccines, impacting public health strategies.
• Future vaccine development requires addressing ongoing concerns and policy considerations.