In a study of 276 healthy volunteers ranging in age from 18 to 55, all participants received nasal drops containing rhinovirus, which causes the common cold.

• 在一项有276个年龄跨度在18岁到55岁健康志愿者参与的研究中，所有的参加者接受了含有能引起感冒鼻病毒的鼻点滴。