CDC asks public health LABS to submit samples of flu viruses from the beginning, peak and end of each flu season, and any unusual samples.

CDC要求各公共健康实验室提供每个流感季节流行初期、高峰期和晚期的流感病毒标本，以及任何异常的标本。

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The pandemic is likely to continue till end of year, experts are suggesting a new wave in fall season, where the number of flu patients peak.

流感的大流行将会持续到年底。根据专家的预测，秋季将会是流感高发期。

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The ongoing monsoon tends to be the peak season for doctors as flu and other infections spread quickly in the humid weather.

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Election Day falls within flu season, as outbreaks can start in October and peak in January.

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The United States is about halfway through the typical 12-week flu season, Frieden said, but the agency is not sure when it will peak.

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