Results 261 to 270 of about 2,702,302 (307)
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Direct and Indirect Effects in Vaccine Efficacy and Effectiveness
American Journal of Epidemiology, 1991In 1915, Greenwood and Yule noted that for valid vaccine efficacy studies, exposure to infection in the vaccinated and the unvaccinated must be equal (Proc R Soc Med 1915;8(part 2):113-94). The direct effect of a vaccine, however, needs to be defined by the protection it confers given a specific amount of exposure to infection, not just a comparable ...
M E, Halloran +3 more
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2003
Indirect effects of HS on organisms include changes in bioconcentrations and toxicity of xenobiotics and metals, thus reducing the chemical stress an aquatic organism may be exposed to. Compared to the current low level of knowledge of the direct effects of HS on aquatic organisms, the indirect effects are very well known.
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Indirect effects of HS on organisms include changes in bioconcentrations and toxicity of xenobiotics and metals, thus reducing the chemical stress an aquatic organism may be exposed to. Compared to the current low level of knowledge of the direct effects of HS on aquatic organisms, the indirect effects are very well known.
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Indirect Effects of Desegregation
1986In the years since desegregation has become national policy, little can be said about whether or not that policy has been successful. Many reasons have been cited as to why the evidence remains inconclusive. These reasons include such factors as the failure to conduct desegregation research within a theoretical framework, the frequent use of inadequate
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A review of recent advances in indirect evaporative cooling technology
International Communications in Heat and Mass Transfer, 2021Uzair Sajjad +2 more
exaly
2007
Abstract Counting the number of black children attending desegregated schools is only one way—and perhaps a rather poor one—of evaluating Brown’s importance. Countless scholars have asserted Brown’s broader significance, calling the decision “the most important political, social, and legal event in America’s twentieth-century history ...
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Abstract Counting the number of black children attending desegregated schools is only one way—and perhaps a rather poor one—of evaluating Brown’s importance. Countless scholars have asserted Brown’s broader significance, calling the decision “the most important political, social, and legal event in America’s twentieth-century history ...
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Indirect Effects of the COVID-19 Pandemic: A Cause-of-Death Analysis of Life Expectancy Changes in 24 Countries, 2015 to ...
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Indirect (Unanticipated) Effects of Intervention
Annals of the New York Academy of Sciences, 1994openaire +2 more sources