The Mexican flu had been especially vicious among the young, though death by other means had not spared any age group.

NPR: Excerpt: 'World Made By Hand'

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

CNN: World battles swine flu as death toll rises

In 2009, the city quarantined 286 guests staying at a downtown hotel for seven days after a Mexican traveller was confirmed as contracting swine flu.

BBC: Sars legacy still felt in Hong Kong, 10 years on

As of late Sunday, Mexican health officials reported 568 cases and 22 fatalities linked to the flu.

CNN: Confirmed cases of H1N1 virus approach 900

President Barack Obama spoke with Mexican President Felipe Calderon on Saturday afternoon to discuss both countries' "efforts to limit the spread of the 2009 H1N1 flu strain and the importance of close U.S.-Mexican cooperation, " the White House said in a statement.

CNN: Farmer may have given swine flu to pigs, Canada says

After the swine-flu crisis of 2009 -- when some cruise ships diverted routes from Mexican ports that had no reported cases to American ones that did -- travel bounced back a bit last year.

CNN: Travel expert: Why you should go to Mexico

The WHO raised the alert to the second highest level of five on Wednesday after a Mexican child died while on a visit to the US state of Texas - the first death from the swine flu outside Mexico.

BBC: Africa awaits two swine flu tests

China suspended flights into and out of Mexico after a 25-year-old Mexican man who arrived in Shanghai from Mexico City on April 30 became China's first confirmed case of swine flu.

CNN: Mexico lowers swine flu alert as businesses in capital reopen