The story

Tucked away in this small mountain village, off a dusty road flanked by pig farms, is where the earliest case of swine flu -- a virus spreading globally -- was confirmed.

Meet the child known as "patient zero" by his doctors -- 5-year-old Edgar Hernandez, who survived the earliest documented case of swine flu in an outbreak that, officials say, has now spread across four continents.

His family lives in the 3,000-population village of La Gloria in the state of Veracruz, where a flu outbreak was reported on April 2. State officials arrived and took samples from dozens of people. Read full article »

CNN Chief Medical Correspondent Dr. Sanjay Gupta in La Gloria, Mexico, contributed to this report.

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