Draft guideline on data requirements for multi-strain dossiers for inactivated vaccines against avian influenza (AI), bluetongue (BT) and foot-and-mouth disease (FMD) - Revision 1(禽流感（AI）、蓝舌病（BT）和口蹄疫（FMD）灭活疫苗多毒株档案数据要求指南草案——第1版)