Many commercial attenuated vaccines derived from local IBV field isolates have been used to control IBV in China besides Massachusetts serotype vaccines H120 and H52 that were imported.

• 我国在防制鸡传染性支气管炎过程中,目前通常采用马萨诸塞(Massachusetts)血清型疫苗H120,H52,还有许多由地方分离株通过鸡胚致弱制备的商品化活疫苗。