The HI antibody titers against H5 viral antigen in domestic geese.

<p>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. 2<sup>nd</sup> vac., the second vaccination. The horizontal dash line is the qualified antibody titer according to the requirements of commercial vaccine. ***, <i>P</i> < 0.01.</p>