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Google just launched an experimental version of Flu Trends that focuses only on the current flu outbreak in Mexico. Google Flu Trends, which was launched last November, tracks and maps flu-related search queries to predict how many people in a given region actually have the flu. Google stresses that Flu Trends for Mexico is only an experimental product, and that it tries to distinguish between topical searches about the flu and searches by users who may actual experience flu symptoms. Given the current interest in the swine flu, a lot of users are obviously looking for general information about it, which could easily skew Google's algorithms.