The story

The World Health Organization cautioned that the swine flu outbreak could gain momentum in the months ahead, despite claims by the health secretary of Mexico -- the epicenter of the outbreak -- that the virus "is in its declining phase."

As of early Monday, Mexican health officials reported 568 cases and 22 fatalities linked to the flu. WHO says it has confirmed 506 cases and 19 deaths in Mexico.

The world has 985 confirmed cases of the virus, known to scientists H1N1 virus, in a total of 20 countries, WHO said Monday. Read full article »

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