流感怎样传播 流感病毒是一种RNA病毒，主要有甲、乙、丙三种。由于流感病毒的抗原特性很不稳定，很容易发生变异，所以人类对其很难产生持久的免疫力，而不像麻疹出过一次就不会再患。尤其是甲
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Channel Details:
- Title: 小儿感冒
- Channel Number: 10389506
- Language: Chinese
- Registered On: March 31, 2013, 11:18 am
- Number of Articles: 50
- Latest Snapshot: September 19, 2014, 1:46 pm
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- Description: 儿童症状 / 小儿感冒
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