And it's this rapid-fire mutation that makes whipping up a vaccine for this set of viruses a pretty tall order.

正是这种快速的突为防御病毒打疫苗成为了个很高的要求。

For example, analysing the genes of a weaponized pathogen as it spreads could give us clues as to where it came from, based on the mutations it develops.

例如，分析种武器化病原体在传播过程中的基因，可以根据它产生的突，为供它来自何处的线索。

Most of these gene mutations are deletions or duplications of one or more exons, and a small amount are point mutations.

基因突大多数为个或多个外显子的缺失或重复，小部分是点突。

The incidence of HER2 mutations ranges from 2% to 4%.

HER2突的发生率为2%至4%。