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Science 2 November 2001:
Vol. 294. no. 5544, p. 985
DOI: 10.1126/science.294.5544.985

News Focus

BIOTERRORISM:
Smallpox Vaccinations: How Much Protection Remains?

Jon Cohen

Immunity from smallpox vaccination is widely assumed to decline rapidly, and those vaccinated 30 or more years ago are now unprotected. But a handful of researchers who have examined the scientific literature, including century-old studies as well as state-of-the-art explorations of immunologic memory, believe protection may be far more durable.

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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J. Martinez, X. Huang, and Y. Yang (2008)
J. Immunol. 180, 1592-1597
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Development of Smallpox Vaccine Candidates with Integrated Interleukin-15 That Demonstrate Superior Immunogenicity, Efficacy, and Safety in Mice.
L. P. Perera, T. A. Waldmann, J. D. Mosca, N. Baldwin, J. A. Berzofsky, and S.-K. Oh (2007)
J. Virol. 81, 8774-8783
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Persisting Humoral Antiviral Immunity within the Japanese Population after the Discontinuation in 1976 of Routine Smallpox Vaccinations.
S. Hatakeyama, K. Moriya, M. Saijo, Y. Morisawa, I. Kurane, K. Koike, S. Kimura, and S. Morikawa (2005)
Clin. Vaccine Immunol. 12, 520-524
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Modified Vaccinia Virus Ankara Immunization Protects against Lethal Challenge with Recombinant Vaccinia Virus Expressing Murine Interleukin-4.
L. H. McCurdy, J. A. Rutigliano, T. R. Johnson, M. Chen, and B. S. Graham (2004)
J. Virol. 78, 12471-12479
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Distinct Time Effects of Vaccination on Long-Term Proliferative and IFN-{gamma}-producing T Cell Memory to Smallpox in Humans.
B. Combadiere, A. Boissonnas, G. Carcelain, E. Lefranc, A. Samri, F. Bricaire, P. Debre, and B. Autran (2004)
J. Exp. Med. 199, 1585-1593
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The solution structure of the N-terminal domain of E3L shows a tyrosine conformation that may explain its reduced affinity to Z-DNA in vitro.
J. D. Kahmann, D. A. Wecking, V. Putter, K. Lowenhaupt, Y.-G. Kim, P. Schmieder, H. Oschkinat, A. Rich, and M. Schade (2004)
PNAS 101, 2712-2717
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Analysis of Historical Data Suggests Long-lasting Protective Effects of Smallpox Vaccination.
M. Eichner (2003)
Am. J. Epidemiol. 158, 717-723
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Case Isolation and Contact Tracing Can Prevent the Spread of Smallpox.
M. Eichner (2003)
Am. J. Epidemiol. 158, 118-128
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Smallpox: The Main Site of Transmission is the Oropharynx.
S. Baron (2003)
J. Dent. Res. 82, 252
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Evaluation of 21st-Century Risks of Smallpox Vaccination and Policy Options.
J. M. Lane and J. Goldstein (2003)
Ann Intern Med 138, 488-493
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The Public and the Smallpox Threat.
R. J. Blendon, C. M. DesRoches, J. M. Benson, M. J. Herrmann, K. Taylor-Clark, and K. J. Weldon (2003)
N. Engl. J. Med. 348, 426-432
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Responses to Smallpox Vaccine.
M. A. Sauri, J. A. Frelinger, M. L. Garba, R. B. Belshe, and S. E. Frey (2002)
N. Engl. J. Med. 347, 689-690
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The Case for Voluntary Smallpox Vaccination.
W. J. Bicknell (2002)
N. Engl. J. Med. 346, 1323-1325
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The Case for Voluntary Smallpox Vaccination.
W. J. Bicknell (2002)
N. Engl. J. Med. 346, 1323-1325
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Science. ISSN 0036-8075 (print), 1095-9203 (online)