How does asthma work? – 克里斯托弗·E. 嘎

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多于 300 million people around the world suffer from asthma, and around 250,000 people die from it each year. But why do people get asthma, and how can this disease be deadly? 克里斯托弗·E. Gaw describes the main symptoms and treatments of asthma.

Lesson by Christopher E. 嘎, animation by Zedem Media.