美国童年时光的紫雏菊和VC管用吗

紫锥菊提取物对于刺激帮助免疫细胞吞噬病毒有帮助，维C可以提高儿童身体免疫力缩短感冒病程。看一下英文资料是怎么描述这两种的。
Duration of cold episodes that occurred during prophylaxis was significantly reduced in both children and adults. For children this represented an average reduction of 14% in symptom days, while in adults the reduction was 8%.维C可以缩短感冒病程，相对成人来说三驾马车维生素C对缩短儿童感冒病程更有帮助。
Echinacea inhibited virally confirmed colds and especially prevented enveloped virus infections (P < 0.05). Echinacea showed maximal effects on recurrent infections, and preventive effects increased with therapy compliance and adherence to the protocol.紫锥菊可以抑制感冒病毒，防止病毒感染幼儿，同时可以避免宝宝病情反复。

我知道你说的这个童年时光，不过我家的孩子吃的是三个，还有一种是童年时光第一防御液。
我们平时给吃维C，感冒高峰期是紫锥菊和维C一起，感冒初期是三个一起。挺不错的组合，最近两天附近有小孩感冒，我赶紧给孩子吃上了。