The HI antibody titers against H5 viral antigen in domestic geese.
Groups of twenty 14-day-old goslings via subcutaneously route received the prime-boost vaccination of H5 or H5-CVCVA5 vaccines (0.5ml), respectively, and the third group was set as blank control. 2nd vac., the second vaccination. The horizontal dash line is the qualified antibody titer according to the requirements of commercial vaccine. ***, P < 0.01.