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Science 19 June 2009:
Vol. 324. no. 5934, pp. 1496 - 1497
DOI: 10.1126/science.324_1496
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News of the Week

Swine Flu:

After Delays, WHO Agrees: The 2009 Pandemic Has Begun

Jon Cohen and Martin Enserink

When World Health Organization (WHO) chief Margaret Chan declared last week that for the first time in more than 40 years the world is facing an influenza pandemic, she simply stated what everybody already knew. Many leading influenza scientists and public health experts say that the scientific criteria for phase 6—the highest level in WHO's pandemic alert system—had been satisfied for several weeks and that WHO postponed its decision unnecessarily. But WHO says that science wasn't the only factor and that the timing was carefully calibrated to ensure that countries were well-prepared to prevent overreaction.

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Surgical Mask vs N95 Respirator for Preventing Influenza Among Health Care Workers: A Randomized Trial.
M. Loeb, N. Dafoe, J. Mahony, M. John, A. Sarabia, V. Glavin, R. Webby, M. Smieja, D. J. D. Earn, S. Chong, et al. (2009)
JAMA 302, 1865-1871
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Science. ISSN 0036-8075 (print), 1095-9203 (online)