关于恶性肿瘤病毒病因的理论研究已经取得某些进展。作者回顾了早年关于肿瘤病毒病因研究的历程,指出当时在许多实验室里,作为测定原因不明的疾病是否由于病毒所致的基本试验,是通过接种患病组织可滤过的提取物试图传递这种疾病来证明,这种疾病如果能通过滤过物传递,那末就推测它是由病毒引起的。但实际上有许多由病毒引起的疾病并不能通过无细胞提取物传递。 Some theoretical progress has been made on the theoretical study of the causes of malignancy viruses. The author reviews the history of earlier studies on the etiology of oncoviruses and points out that in many laboratories at that time, whether the diseases for which the cause was unknown were due to a virus-induced basic test, which was attempted to transmit this by inoculating filtrable extracts of the diseased tissue. The disease proves that if the disease can pass through the filtrate, it is supposed to be caused by the virus. However, in fact, many diseases caused by viruses cannot be transmitted through cell-free extracts.