Human vaccines & immunotherapeutics
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Hum Vaccin Immunother · Jan 2018
Vaccine hesitancy - a potential threat to the achievements of vaccination programmes in Africa.
Vaccination programmes in Africa have made extraordinary progress over the last four decades. Yet, vaccine hesitancy threatens to erode these gains. Vaccine hesitancy is a continuum between vaccine acceptance and refusal. ⋯ Moreover, tools to measure vaccine hesitancy are scarce, and none that exist have been validated in Africa. We discuss these knowledge gaps, and propose a research and capacity building agenda to better measure and overcome vaccine hesitancy in Africa. Ultimately, this is essential if we hope to enhance and sustain public demand for vaccination and preserve the tremendous achievements of vaccination programmes on the continent.
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Hum Vaccin Immunother · Jan 2018
ReviewExperience and challenges on influenza and pertussis vaccination in pregnant women.
Young infants contribute to relatively high burden of vaccine-preventable diseases, including infections by influenza virus and Bordetella pertussis. Vaccination of pregnant women can enhance transplacental transfer of protective antibody to the fetus and protect the infant against disease during the first few months of life. Pregnant women are a priority group for seasonal influenza vaccination, due to third-trimester pregnancy being a risk-factor for severe influenza illness. ⋯ The increase in specific pertussis antibody among the infants born to vaccinated women might, however, interfere with the active pertussis vaccination of the infant following the primary series of vaccines. The clinical implication of this is yet to be ascertained, particularly since immune responses following the booster vaccine are unaffected. Vaccination of pregnant women with inactivated influenza vaccine and acellular pertussis vaccine have been demonstrated to confer protection to their young infants, and warrants consideration for inclusion into public health immunization programs, including in low and middle income countries.
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Hum Vaccin Immunother · Jan 2018
Determinants of BCG scarification among children in rural Guinea-Bissau: A prospective cohort study.
Bacillus Calmette-Guérin (BCG) vaccination may have beneficial non-specific effects on child survival, the effects being stronger for children developing a scar. In a prospective cohort study, we examined determinants for not developing a BCG scar within 6 months of vaccination. ⋯ Vaccination technique and vaccine strain were associated with BCG scar development while nutritional status and socioeconomic status were not. Scarring rate may therefore be a better indicator of vaccination programme performance than coverage.
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Hum Vaccin Immunother · Jan 2018
Cost-effectiveness of switching from trivalent to quadrivalent inactivated influenza vaccines for the at-risk population in Italy.
Seasonal influenza is caused by two subtypes of influenza A and two lineages of influenza B. Although trivalent influenza vaccines (TIVs) contain both circulating A strains, they contain only a single B-lineage strain. This can lead to mismatches between the vaccine and predominant circulating B lineages, a concern especially for at-risk populations. ⋯ Switching to QIV was most cost-effective for individuals ≥ 65 years of age (€19,170 per QALY). Probabilistic sensitivity analysis showed that the switching from TIV to QIV would be cost-effective for > 91% of simulation at a maximum willingness-to-pay threshold of €40,000 per QALY gained. Although the model did not take herd protection into account, it predicted that the switch from TIV to QIV would be cost-effective for the at-risk population in Italy.
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Hum Vaccin Immunother · Jan 2018
Existence and functionality of national immunisation technical advisory groups in Africa from 2010 to 2016.
We describe the existence and functionality of National Immunisation Technical Advisory Groups (NITAGs) in Africa between 2010 and 2016, using data from the WHO-UNICEF Joint Reporting Form. The number of African countries with NITAGs increased from 15 (28%) in 2010 to 26 (48%) in 2016. Countries with a functioning NITAG increased from 5(9%) in 2010 to 16 (30%) in 2016. ⋯ In 2016, six of the seven African countries (86%) in the WHO Eastern Mediterranean Region had a NITAG, with three (50%) functional. In the WHO African Region, 20 of the 47 countries (43%) had NITAGs; 13 (65%) of them functional. Substantial investments should be made to ensure that every African country has a functional NITAG.