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Here are a few basics about the swine flu outbreak in the U.S. and Mexico.

以下是有关在美国和墨西哥爆发的猪流感的一些基本知识。

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Mexico remains the epicenter of the swine flu outbreak, with more than 150 deaths blamed on the virus.

墨西哥仍然是猪流感疫症爆发的中心，已经有150多人死于猪流感。

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The outbreak of swine flu in Mexico comes at a time when the country is already struggling with the effects of the worldwide economic recession and some loss of tourism caused by drug violence in cities like Juarez.

VOA: standard.2009.04.30

Argentina, which has reported 386 deaths attributed to H1N1 as of August 13, ranks first per capita, the Brazilian health officials said, and Mexico, where the flu outbreak was discovered in April, ranks 14th per capita.

CNN: Brazil tops worldwide H1N1 deaths, officials say

Even before the flu outbreak, Mexico had been especially hard hit, because its economy is so closely tied to that of the United States.

ECONOMIST: Latin America's economies

The World Health Organization on Monday raised its pandemic alert level in response to the outbreak of swine flu that originated in Mexico.

CNN: The story