Navigation Links
Researchers develop method to better estimate vaccine coverage
Date:10/26/2011

Immunizations are a valuable tool for controlling infectious diseases among populations both in the U.S. and globally. Routine immunizations and supplemental immunization activities, such as immunization campaigns, are designed to provide immunization coverage to entire populations. Current measurements used to determine the success and rates of immunization can be flawed and inconsistent. According to a new study led by researchers from the Johns Hopkins Bloomberg School of Public Health, estimates of vaccination coverage can be significantly improved by combining administrative data with survey data. The results are featured in the October 2011 issue of PLoS Medicine.

"Reliable estimates of vaccination coverage are key to managing population immunization status," said Justin Lessler, lead author of the study and an assistant professor with the Bloomberg School's Department of Epidemiology. "Currently, the performance of routine and supplemental immunization activities is measured by the administrative method, which leads to coverage estimates that are often inconsistent with the proportion reporting vaccination in cross-sectional surveys. Furthermore, administrative coverage does not tell you how many people are systematically missed by vaccination activities. We estimated that the size of the population never reached by any activity was high in Sierra Leone and Madagascar, 31 percent and 21percent respectively. But it was much lower in Ghana, only 7 percent. "

The widely used administrative method divides the number of doses distributed by the size of the target population. Lessler, along with colleagues from Johns Hopkins, University of Oxford, Epicentre, and Princeton University developed a method for estimating the effective coverage of vaccination programs using cross-sectional surveys of vaccine coverage combined with administrative data. The method was applied using demographic health survey and administrative coverage data reported to the WHO from measles vaccinations in Ghana, Madagascar and Sierra Leone. They found estimates of routine supplemental immunization activities coverage are substantially lower than administrative estimates for Madagascar and Sierra Leone, and only slightly lower for Ghana. In addition, their estimates of routine coverage are, in general, lower than WHO and United Nations Children's Fund (UNICEF) estimates.

"This method not only attempts to correct coverage estimates, but also distinguishes between issues of overall coverage and vaccine within activity inefficiencies. For our technique to be useful, countries must have cross-sectional data on vaccine coverage for children across a range of ages, some of an age where they have been exposed to multiple vaccination activities," said Derek Cummings.

"Estimates of the inefficiency of past vaccination activities and the proportion not covered by any activity allow us to more accurately predict the results of future activities and provide insight into the ways in which vaccination programs are failing to meet their goals," adds Lessler.


'/>"/>
Contact: Natalie Wood-Wright
nwoodwri@jhsph.edu
410-614-6029
Johns Hopkins University Bloomberg School of Public Health
Source:Eurekalert

Related medicine news :

1. Veterinary researchers discover first US strains of hepatitis E virus from rabbits
2. Researchers have found evidence for the existence of a hypnotic state
3. Blood test could identify smokers at higher risk for heart disease, UT Southwestern researchers find
4. Researchers ID genetic mutation associated with high risk of age-related macular degeneration
5. Hebrew University researchers show how motherhood alters brain function
6. Stanford researchers build transparent, super-stretchy skin-like sensor
7. Biodesign researchers to develop new reagent pipeline for molecular medicine
8. Researchers get $3 million National Institutes of Health grant for mathematical models of prostate cancer aggressiveness
9. Researchers find coupling of proteins promotes glioblastoma development
10. New instrument helps researchers see how diseases start and develop in minute detail
11. Teen Drivers Prone to G-Force Errors, Researchers Say
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... October 13, 2017 , ... ... process to promote standards of excellence for the field of eating disorders, announces ... 22 – 25, 2018 in Orlando, Florida at the Omni Resort at ChampionsGate. ...
(Date:10/13/2017)... ... October 13, 2017 , ... Many families have long-term ... long-term care insurance companies have a waiver for care if the client has a ... when the family pays for care, is often waived, so the benefits from their ...
(Date:10/13/2017)... ... October 13, 2017 , ... ... giving viewers the lowdown on sciatica in a new episode of "Success Files," ... on current events and innovation and investigates each subject in-depth with passion and ...
(Date:10/12/2017)... Francisco, CA (PRWEB) , ... October 12, 2017 ... ... Dr. Cheng, are now treating sleep apnea using cutting-edge Oventus O2Vent ... apnea, a serious sleep disorder characterized by frequent cessation in breathing. Oral appliances ...
(Date:10/12/2017)... , ... October 12, 2017 , ... ... a leader in post-acute health care, have expanded their existing home health joint ... Health. , AccentCare has been operating a joint venture home health company with ...
Breaking Medicine News(10 mins):
(Date:9/22/2017)... Md. , Sept. 22, 2017  As the ... Republican Senators Bill Cassidy (R-LA) and ... Information notes that the medical device industry is in ... medical device tax, the 2.3% excise tax on medical ... But they also want covered patients, increased visits and ...
(Date:9/19/2017)... Ky. , Sept. 19, 2017   ZirMed Inc ... predictive analytics, today announced that it has been ranked #1 ... Black Book™ Rankings 2017 User Survey. ZirMed was ... solution for large hospitals and medical centers over 200 beds ... Black Book,s healthcare technology user survey history. ...
(Date:9/13/2017)... , Sept. 13, 2017   OrthoAtlanta has ... the Atlanta Football Host Committee (AFHC) for the 2018 College ... Jan. 8, 2018, at Mercedes-Benz Stadium in Atlanta, ... of the AFHC "I,m In" campaign, participating in many activities ... ...
Breaking Medicine Technology: