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Governments and health officials around the world continued to take steps Tuesday against the outbreak of swine flu that has killed scores of people in Mexico and spread to the U.S., Europe and possibly Asia.

By Tuesday, Mexican health officials suspect that the swine flu outbreak has caused more than 159 deaths and roughly 2,500 illnesses.

The World Health Organization says at least 105 cases have been confirmed worldwide, including 64 in the United States; 26 in Mexico; six in Canada; three in New Zealand; and two each in Spain, the United Kingdom and Israel. WHO has confirmed deaths only in Mexico, where seven people have died from swine flu.

In the United States, California, Indiana and Texas also were reporting additional cases not confirmed by the Centers for Disease Control and Prevention.

Meanwhile, Mexican authorities are focusing on a young boy being referred to as "patient zero" by his doctors -- 5-year-old Edgar Hernandez, who survived the earliest documented case of the swine flu outbreak. Read full article »

This article incorporates reports from CNN's Mayra Cuevas, Karl Penhaul, Umaro Djau, Saeed Ahmed, Ariel Crespo, Ted Rowlands, Phil Black and Jeanne Meserve, and interviews on Anderson Cooper's show, "AC 360."

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