According to the Louisiana Department of Health and Hospitals, as many as 20,000 Louisianians have contracted the swine flu since April, though only 449 cases have been confirmed to date. So far, children and young adults have been affected most. In response to growing national concerns, the CDC recently released guidance and strategies for businesses to use if flu conditions become more severe. Flu prevention tips designed specifically for daycare centers, schools and universities can also be found here. Photo: Anne Cottingham