《地平线之过敏症·现代生活和我》是由导演：Rebecca Harrison，主演：未知演员等共同参演的一部值得大家观看的电影，还在等什么？赶紧点击上方地址观看吧！

Changes to the bacteria that live inside all of us are responsible for increasing the number of people with allergies, suggests new research. 　　In this episode of Horizon, the show investigates this claim by conducting a unique experiment with two allergic families in order to find out just what it is in the modern world that is to blame. With a raft of mini cameras, GPS units an...