… This review focuses on challenges of estimating vaccine effectiveness, which by definition
is obtained from observational studies, whereas vaccine efficacy is obtained from randomized …

… calculation of the vaccine effectiveness by the Broome method as 1–(odds of vaccination
in a case infected by a serotype included in the vaccine (cases): odds of vaccination in a case …

… Given the known vaccine effectiveness of OPV, the critical vaccine coverage required to
interrupt transmission in the population can be determined: in this case: 84–90%. In Japan, …

… This paper will focus on population-based vaccine effectiveness (VE) studies. Evaluations
of VE occur after vaccine efficacy has been established, and assess how well a vaccine …

… of vaccines’ effectiveness and safety. Policymakers, physicians, and public health officials
should examine health plan enrollees’ preferences as they consider remedies for vaccine …

… most critical vaccine component from a public health standpoint. … The 3C.1 clade had been
selected for the vaccine, but in … that were antigenically similar to the vaccine strain [11]. In 2017…

… health status on estimates of influenza vaccine effectiveness, … by previous influenza vaccine
effectiveness studies to assess … Minnesota, New York, and Oregon: data from 3 health plans. …

… the largest US health plan claims databases and comprises 150 million unique enrollees.
The database includes information on demographics, payer type, health plan enrollment dates…

… Our point estimate of vaccine effectiveness of 44 percent (95 percent … vaccine is
recommended for all persons 65 years of age or older on the basis of evidence of its effectiveness …

… case-control studies evaluating vaccine effectiveness; we summarize the recommendations
… of the results of case-control vaccine effectiveness studies. Vaccination status is the primary …