Frieden said in a statement.

Frieden在一份声明中说。

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"This flu is much harder on younger people," Frieden said.

“这种流感在年轻人患上更严重。”弗里登说。

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Fewer than 1,000 people under the age of 50 die from flu in a normal season, Dr. Frieden said.

弗里登说，在正常的流感季节，美国50岁以下人群因流感死亡的病例不超过1,000例。

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"This flu season has been worse than average and particularly severe for the elderly, " Frieden said.

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"We know that it's not nearly as much as we would have liked, " Frieden said.

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"We do these messages, we do these campaigns for one simple reason -- they work, " Frieden said.

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