The Mexico government has insisted it acted quickly and decisively when presented with the evidence of a new virus.
But even as it did so, it acknowledged the outbreak began earlier than April 12, the date it had previously linked to the first case. Cordova confirmed Monday that a 4-year-old boy who was part of an outbreak in eastern Veracruz state that began in February had swine flu. He later recovered.
Residents of the town of Perote said at the time that they had a new, aggressive bug—even taking to the streets to demonstrate against the pig farm they blamed for their illness—but were told they were suffering from a typical flu. It was only after U.S. labs confirmed a swine flu outbreak that Mexican officials sent the boy's sample in for swine flu testing.