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Acute Infection May Delay Cancer Development, Could Vaccines Inadvertently Contribute to Cancer?

16th April 2007 by Arrow Durfee Posted in Uncategorized

1: Cancer Detect Prev. 2006;30(1):83-93. Epub 2006 Feb 21. Links
Acute infections as a means of cancer prevention: opposing effects to chronic infections?
www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=16490323&dopt=Citation
Hoption Cann SA,
van Netten JP,
van Netten C.
Department of Health Care and Epidemiology, University of British Columbia, 5804 Fairview Avenue, Vancouver, BC, Canada V6T 1Z3. stephen.hoption.cann@ubc.ca
PURPOSE: Epidemiological studies have found an inverse association between acute infections and cancer development. In this paper, we review the evidence examining this potentially antagonistic relationship. METHODS: In addition to a review of the historical literature, we examined the recent epidemiological evidence on the relationship between acute infections and subsequent cancer development in adult life. We also discuss the impact of chronic infections on tumor development and the influence of the immune system in this process. RESULTS: Exposures to febrile infectious childhood diseases were associated with subsequently reduced risks for melanoma, ovary, and multiple cancers combined, significant in the latter two groups. Epidemiological studies on common acute infections in adults and subsequent cancer development found these infections to be associated with reduced risks for meningioma, glioma, melanoma and multiple cancers combined, significantly for the latter three groups. Overall, risk reduction increased with the frequency of infections, with febrile infections affording the greatest protection. In contrast to acute infections, chronic infections can be viewed as resulting from a failed immune response and an increasing number have been associated with an elevated cancer risk. CONCLUSION: Infections may play a paradoxical role in cancer development with chronic infections often being tumorigenic and acute infections being antagonistic to cancer.
PMID: 16490323 [PubMed - indexed for MEDLINE]

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