Mexico's gets praise, Argentina and Britain criticism for swine flu response as caseload grows. As swine flu runs rampant in the Southern Hemisphere winter, world health experts are concerned that some hard-hit countries have been reluctant to take forceful measures to protect public health.

As swine flu runs rampant in the Southern Hemisphere winter, world health experts are concerned that some hard-hit countries have been reluctant to take forceful measures to protect public health.