Although critics countered that such viruses could be exerting only an indirect effect against cancer by generally activating an individual ' s immune system and making it more likely to detect and kill cancer cells , reports continued to pop up in the medical literature linking viral infection and cancer remission 虽然有批评者反对这种说法，认为这类病毒只不过是活化了免疫系统，造成个体更容易侦测并歼灭癌细胞，因此属于间接作用；然而将病毒感染与癌症好转相提并论的医学文献，仍史不绝书。
