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The drug designation 'japanese encephalitis vaccine, live-Liaoning Chengda Biotechnology CO., LTD-Japanese encephalitis' refers to the live attenuated Japanese encephalitis vaccine (specifically the SA14-14-2 strain) as utilized in clinical trials sponsored by Liaoning Chengda Biotechnology Co., Ltd. While the input name associates the live vaccine with Liaoning Chengda, that company primarily manufactures an inactivated Vero cell-derived vaccine (JEVAC). The live attenuated vaccine is produced by the Chengdu Institute of Biological Products and is based on the SA14-14-2 strain of the Japanese encephalitis virus, which has been attenuated through serial passage in primary hamster kidney cells. It works by inducing a robust and long-lasting immune response, including the production of neutralizing antibodies against the virus's envelope protein. It is widely used in China and other endemic regions to provide protection against Japanese encephalitis, a mosquito-borne viral infection that can cause severe neurological disease.
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