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A child receives a vaccine at a community healthcare center in Qinhuangdao City, north China's Hebei Province. Thursday marks the children's vaccination day in China. (Xinhua/Cao Jianxiong)?
A child receives a vaccine at a community healthcare center in Qinhuangdao City, north China's Hebei Province. Thursday marks the children's vaccination day in China. (Xinhua/Cao Jianxiong)?