Methods Thirty Balb/C mice were randomly divided into phosphate buffer solution (PBS) control group, OVA group and OVA/RSV group.

• 方法 采用随机数字表法将30只Balb/C小鼠分为3组:磷酸盐缓冲液（PBS）对照组、卵白蛋白（OVA）组和OVA/RSV组。