How Virus Mutations Drive Outbreaks

Virus mutations can change how quickly a virus evolves and spreads. A mutation is a change in the sequence of bases in DNA or RNA. Some mutations happen when the genome is copied. They are caused by errors made by polymerase enzymes, which replicate DNA or RNA.

RNA viruses often change faster tha...

病毒复制时，

由于突变和遗传物质的永久性变化，

病毒的基因也可以进化

当核糖核酸存在时会发生更多的自发错误

这是因为复制需要逆转录酶

而录酶不校正，

导致快速进化的可能性增长

还可以导致耐药性

人类免疫缺陷病毒(艾滋病)也如此

使得艾滋病很难对抗