What if this is a gene that's causing a cell to be cancerous?

但假如是个能导致细胞癌变的基因呢

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You can see that it would be problem here if the gene that you were trying to give to the cancer cells also went to normal cells-- that would be a problem.

这确实是个问题,如果我们想导入癌细胞的自杀基因,也能进入正常细胞,那问题就大了

耶鲁公开课 - 生物医学工程探索课程节选