Article
為什麼要種牛痘 - why needs man Cowpox vaccination
Subject matters: 答問 - questions and answers, 書信 - letter, 新知 - new knowledge,
Language level: Baihua
Keywords: disease, Medicine, Knowledge,
Persons:
珍玲 Zhenling (mentioned in article, Author, Editor)
美英 Meiying (Author, mentioned in article)