RNA polymerases are more likely to make copying errors than DNA polymerases and therefore often make mistakes during transcription, this is why mutations in RNA viruses occur more frequently than in DNA viruses.

RNA聚合酶在复制时比DNA聚合酶更容易产生错误，因此在转录过程中经常出错，也就是为什么RNA病毒的突变比DNA病毒发生得更频繁。