30 months after vaccination. 15 dogs produced high titer antibodies against rabies virus at 1 month after vaccination 66% of degs had high antibody titer at 30 months post-vaccination.

• 15只犬免疫1月后，血清抗体全部阳转，66%25的犬在30个月后抗体仍维持在一个较高水平。