People wearing face masks gather outside of buildings after an earthquake in Mexico City April 27, 2009. Southern Mexico was hit by a 6.0 magnitude earthquake on Monday that shook buildings in the capital, Mexico City, but there were no immediate reports of deaths or damage. Hundreds of people evacuated buildings in the capital, many of them wearing surgical face masks due to the deadly swine flu outbreak that is suspected of causing 149 deaths in Mexico. REUTERS/Eliana Aponte (MEXICO DISASTER ENVIRONMENT HEALTH)
REUTERS/ELIANA APONTE