 In nature enzootic disease patterns suggest that the virus can be latent and can be cleared over the course of a year.One recognized feature of the Sendai virus, shared with members of its genus, is the ability to induce syncytia formation "in vivo" and "in vitro" in eukaryotic cell cultures.The formation of syncytium helps the virus to avoid neutralizing antibodies of the host organism during the spread of infection.The mechanism for this process is fairly well understood and is very similar to the fusion process employed by the virion to facilitate cellular entry.