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研究目的是观察接种乙肝疫苗是否增加新生儿早期不明原因发热的发病率。 方法１９９１年１月１日一１９９２年１２月３１日在以色列Ｃｈａｉｍ Ｓｈｅｂａ医疗中心住院的有体温调节异常的足月新生儿为研究对象，发热病因明确的除外．不明原因发热是指生后前３天体温超过３８℃?
The purpose of the study was to investigate whether vaccination with hepatitis B increases the incidence of unexplained fever in the early neonates. Methods January 1, 1991-December 31, 1992 were hospitalized at the Chaim Sheba Medical Center in Israel with term abnormalities of full-term newborns, with the exception of specific cause of fever. Unknown fever refers to the first 3 days after birth body temperature over 38 ℃?