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三田村氏等曾在南京和上海(1943)及Sabin氏等在上海和天津(1946)用正常人血清舆流行性乙型腦炎病毒做中和試驗,推論在中國上述地區的成人可能有80%以上有對乙型腦炎的隱性感染。我們自1953年進行對乙型腦炎隱性感染的調查研究。1954年底兩年中共採集本市居民血清標本568件,根據採集時間和地點約可分為以下四組:
Murata has done neutralization tests with normal human Japanese encephalitis virus in Nanjing and Shanghai (1943) and Sabin’s in Shanghai and Tianjin (1946) and concluded that 80% of adults in these areas in China are likely to be infected The above has a latent infection of Japanese encephalitis. We conducted a survey of latent infections of Japanese encephalitis since 1953. In the last two years of 1954, a total of 568 serum samples collected from the residents of the municipality were collected, which were divided into the following four groups according to the collection time and place: