Flu Trends is limited to the US.

流感预测目前也只是限于在美国。

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Google just launched an experimental version of flu Trends that focuses only on the current flu outbreak in Mexico.

Google刚刚发布了一个实验版流感趋势(Flu Trends)产品，目前仅关注墨西哥当前的猪流感。

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Where Google Flu Trends may prove more useful, however, is in the tracking of an epidemic once it is under way.

尽管如此，google流感趋势在有些方面被证明还是有益处的，比如在跟踪一个已经开始传播的流行病方面。

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We built Google Flu Trends as a complementary data source to the surveillance systems run by the CDC.

FORBES: How Accurate Is Google Flu Trends?

Google's Flu Trends looks at search terms to create real-time estimates of where the flu is flaring up.

CNN: Tracking the flu with technology and Twitter

Google Flu Trends was launched to the public in November 2008 as a new way to track flu activity.

CNN: Flu season picking up speed, tracking indicates