It concluded that the S 79 strain and the Jeryl Lynn strain might be from a same origin. The results suggest also the possibility that more than two types of mumps virus could circulate in the same area.

• 推测S79株可能与JerylLynn株同源，同一地区可能有两种以上的腮腺炎病毒野毒株导致流行性腮腺炎的发生