After the prophylactic vaccination to yaks with
FMDV, a well-designed surveillance program should be
also established to evaluate the immune efficacy of
vaccine. However, to date, no accurate statistics
concerning FMDV immune response to yaks are
available. This study was undertaken to investigate the
immune efficacy of serotypes O and Asia-1 bivalent
inactivated vaccines on yaks by determining the serum
antibody levels on them.