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Why has the cumulative number of confirmed cases in Ziyang not increased?

47 cases were under control. The cumulative number of confirmed cases of Ziyang epidemic is 47, but the epidemic has not increased due to the control of the epidemic. Ziyang, a prefecture-level city under the jurisdiction of Sichuan Province, is Ziyang County under the jurisdiction of Guzizhou. Changhong, Dong Jun and Wang Bo, ancient writers, are also called "Three Sages of Ziyang", and Lezhi is the hometown of Chen Yi, the founding marshal. Wear a mask during the epidemic to protect yourself.