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　冬季儿童呼吸道疾病多发，其中流感病毒是常见的病原体之一。如何区分流感和普通感冒？流感典型症状有哪些，一般病程多长？哪些儿童发生重症的风险较高？今天，我们就家长朋友们最关心的问题，进行解答。流感有哪些典

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