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Official: US has first death from swine flu
(Agencies)
Updated: 2009-04-29 19:01

Authorities sought to keep the crisis in context: Flu deaths are common around the world. In the U.S. alone, the CDC says about 36,000 people a year die of flu-related causes. Still, the CDC calls the new strain a combination of pig, bird and human viruses for which people may have limited natural immunity.

Full coverage:
 Official: US has first death from swine flu Swine Flu Outbreak

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Hence the need for a vaccine. Using samples of the flu taken from people who fell ill in Mexico and the U.S., scientists are engineering a strain that could trigger the immune system without causing illness. The hope is to get that ingredient — called a "reference strain" in vaccine jargon — to manufacturers around the second week of May, so they can begin their own laborious production work, said CDC's Dr. Ruben Donis, who is leading that effort.

Vaccine manufacturers are just beginning production for next winter's regular influenza vaccine, which protects against three human flu strains. The WHO wants them to stay with that course for now — it won't call for mass production of a swine flu vaccine unless the outbreak worsens globally. But sometimes new flu strains pop up briefly at the end of one flu season and go away only to re-emerge the next fall, and at the very least there should be a vaccine in time for next winter's flu season, Dr. Anthony Fauci, the National Institutes of Health's infectious diseases chief, said Tuesday.

"Right now it's moving very rapidly," he said of the vaccine development.

Besser appeared on NBC's "Meet the Press," CNN and CBS's "The Early Show."

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