Total capacity is said to be 1 billion doses per year under a revised pharmaceutical GMP, according to WHO standards. Smallpox is eradicated, since 2000, China is polio-free, and children under 5 years carrying the hepatitis B surface antigen was down to 0.96 % in 2006. Chengdu Institute of Biological Products is among the WHO-classified laboratories for the production of live attenuated Japanese encephalitis vaccine.
China Bio news release, March 3, 2014