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However, Koch never credited the Hesses for their discovery of bacteriological agar, perhaps because, at the time, he failed to recognize its importance. Even after he received the insight about agar from the Hesses, Koch stuck with gelatine for years. In 1883-84, during his first medical expedition to Egypt and India to investigate cholera, he tried and failed to grow the cholera bacterium on gelatine media in the hot climate of Cairo (despite using a half-open fridge for incubation), only succeeding in the colder winter of Calcutta.，更多细节参见同城约会
2017年，習近平將張又俠提拔為政治局委員兼軍委副主席。2022年二十大，72歲的張又俠打破退休年齡慣例被留任，排名從第二副主席上升到第一位。這被視為習近平對其「信任重託」的明證。