They waited a bit to give the unbound nanobodies time to filter out of the body, then injected the prodrug.

• 医生又给予另一群小鼠高剂量接上了酵素的双效奈米抗体，他们先等待一段时间，让未能捉住抗原的奈米抗体排出体外，然后注射前驱药物。