[Hong Kong, June 11. Image via Getty]

A masked girl sits with a classmate at a kindergarten in a residential estate in Hong Kong on June 11, 2009. Hong Kong authorities on June 11 ordered all primary schools in the city to be closed for two weeks after the first cluster of local swine flu cases was found. The move came after 12 pupils at a city secondary school were found to have contracted the A(H1N1) virus, chief executive Donald Tsang told reporters. AFP PHOTO/MIKE CLARKE (Photo credit should read MIKE CLARKE/AFP/Getty Images)