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However, Koch had to abandon part of his first postulate when he discovered that healthy people could carry the germs of certain diseases and yet show no symptoms.
然而科赫后来发现，一些健康的人能毫无症状地携带某种特定致病菌，而且一些人暴露于狂犬病菌却依然没有患上狂犬病。
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