They only care that it's safer and better-protected than other vehicles.

VOA: standard.2010.08.01

That is also an advantage of using them as gene therapy vehicles because they will only infect cells that they are - that they have an affinity for or that they're prone to affect.

非常有利于将其,作为基因治疗的载体使用,因为它们只能感染那些--,它们对之具有亲和性,或者说它们倾向于去感染的细胞

耶鲁公开课 - 生物医学工程探索课程节选