He believes the system should rely on a range of official sources, such as hospital admissions, prescriptions for anti-viral drug Tamiflu and sales of over-the-counter medicines, rather than anecdotal evidence culled from social media.

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The official range of the Leaf is 73 miles, says the EPA, which also rates it at 99 mpg equivalent.

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The company formally announced the Liquid E1 last month, but with Mobile World Congress around the corner, the mid-range phone just got official for the European market.

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