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BCG vaccine |
Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson | 0.07 sec. |
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Methodological considerations in case-control studies to evaluate BCG vaccine effectiveness. The scientists gave the new vaccine to 17 volunteers who had received the BCG vaccine in the past--as recently as within a year or as long as 38 years ago. Although the BCG vaccine offers protection against the most serious forms of TB in childhood, its efficacy wanes over a period of 10-15 years after the vaccination. |
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