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Potential vaccines raise ethical, logistical, and economic concerns.

Several years ago, central questions in the AIDS research field were: Is it possible to develop a vaccine against HIV? If so, when, and what strategies show the most promise? Now, even with no safe and effective vaccine in the pipeline, attention is nonetheless shifting towards potential problems associated with selecting the populations most in need of the product, conducting the clinical trials, and delivering the vaccine in a fair and equitable manner. These problems were the focus of a session at the annual meeting of the American Association for the Advancement of Science (AAAS), held in San Francisco in February. The following articles summarize two of the presentations at the session.

AIDS Vaccines↗
PubMed1987

Flexible fiberoptic sigmoidoscopy. Logistics and economics of office use.

Early detection of colorectal cancer, followed by surgical excision, can effect a cure in 50% of patients. The flexible fiberoptic sigmoidoscope enables identification of lesions in the premalignant or early malignant stages. Its use is cost-effective in any practice that includes more than 200 to 300 patients over age 50, and the procedure is well accepted by patients. Available options for learning the technique are listed, along with their approximate fees. The author explores all considerations pertinent to instituting this screening procedure and suggests the best way to introduce sigmoidoscopy into the established office routine.

Adult↗