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1989～1990年期间,美国的麻疹发病率急剧增高。作者发现,1990年是近十年来发病率最高的年份,各年龄组均受到影响。本文分析了麻疹发病率增高的原因。为了了解当前麻疹流行的特征,选择符合临床诊断、有血清学检测或流行病学证据的病例进行分析。根据受影响最突出的年龄分为学龄前(<5岁)、学龄期(5～19
During the period 1989-1990, the incidence of measles in the United States increased dramatically. The authors found that 1990 was the year with the highest incidence in nearly a decade, with all age groups affected. This article analyzes the reasons for the increased incidence of measles. To understand the current epidemic of measles, select cases that are clinically diagnosed, serologically tested or epidemiologically documented. According to the most prominent affected age is divided into preschool (<5 years old), school age (5 ~ 19