Sato Mmaeda N, Maeda N, Urade M, Kuribayashi M, Shirasuna K, Yoshida H, Miyazaki T
Arch Virol. 1978;56(1-2):181-7. doi: 10.1007/BF01317294.
Infection of primary human cells with a rubella variant carrying DNA polymerase activity resulted in persistent infection; infection with wild type virus caused death of the infected cells and a cytopathic effect.