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上海市自从推行白喉、麻疹和乙型脑炎预防接种以来,这三种传染病的发病率均已大大下降,但近年国内外曾报告成人中白喉和麻疹爆发流行,乙型脑炎病例亦
Since the introduction of vaccination against diphtheria, measles and Japanese encephalitis in Shanghai, the incidence of these three infectious diseases has dropped drastically. In recent years, however, outbreaks of diphtheria and measles have been reported in adults both at home and abroad. Cases of Japanese encephalitis