Research Progress of Novel Vaccines against African Swine Fever Virus
African swine fever virus(ASFV)has remained for about a century,which has brought huge economic losses and threats to the world. Therefore,the study on vaccines against ASFV has been continued by scientists both at home and abroad,from the early inactivated vaccines,attenuated live vaccines to current new vaccines,including gene deletion attenuated live vaccines,subunit vaccines,live vector vaccines,DNA vaccines,single-cycle virus vaccines,etc. But up to now,no effective vaccine had been developed or produced. It was studied that inactivated vaccines were not protective or partially protective;subunit vaccines were partially protective;gene deletion live attenuated vaccines had been proven to be homologous-protective,but their safety had not been solved;although live vector vaccines could produce specific antibodies,further research was still needed;DNA vaccines could induce humoral or cellular immunity,but failed to provide protection. At present,a kind of novel single-cycle virus vaccine was being studied,which also provided a new option for the development of novel vaccines against ASFV. With the continuous development of genetic engineering technology and molecular biology technology as well as the in-depth study on ASFV genome,vaccines against ASF were expected to be successfully developed.