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In response to the global spread of emerging infectious diseases and the threat of bioterrorism, high-containment biosafety laboratories (BSL)--specifically biosafety level (BSL)-3 and BSL-4--have been proliferating in the United States.
Despite progress in HIV/AIDS drug treatments and the reduction of AIDS mortality in the United States, challenges remain concerning the availability of these drugs for individuals with HIV/AIDS and the prevention of new cases.
In early October 2004, the nation lost about half its expected influenza vaccine supply when one of two major manufacturers announced it would not release any vaccine for the 2004-05 season because of potential contamination.
Vaccine shortages and distribution problems during the 2004-2005 influenza season raised concerns about the nation's ability to respond to a worldwide influenza epidemic--or influenza pandemic--which many experts believe to be inevitable.