Senior microbiologist for the County of San Diego Health and Human Services Agency Anna Liza Manlutac begins her testing for influenza at the country health lab in San Diego, California April 26, 2009. Governments around the world rushed on Sunday to check the spread of a new type of swine flu that has killed up to 81 people in Mexico and infected around a dozen in the United States. REUTERS/MikeBlake (UNITED STATES ENVIRONMENT HEALTH SOCIETY SCI TECH)
REUTERS/MIKE BLAKE