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https://www.readbyqxmd.com/read/28934167/live-attenuated-influenza-vaccine-contains-substantial-and-unexpected-amounts-of-defective-viral-genomic-rna
#1
Philip S Gould, Andrew J Easton, Nigel J Dimmock
The live attenuated influenza vaccine FluMist(®) was withdrawn in the USA by the Centers for Disease Control and Prevention after its failure to provide adequate protective immunity during 2013-2016. The vaccine uses attenuated core type A and type B viruses, reconfigured each year to express the two major surface antigens of the currently circulating viruses. Here Fluenz™ Tetra, the European version of this vaccine, was examined directly for defective-interfering (DI) viral RNAs. DI RNAs are deleted versions of the infectious virus genome, and have powerful biological properties including attenuation of infection, reduction of infectious virus yield, and stimulation of some immune responses...
September 21, 2017: Viruses
https://www.readbyqxmd.com/read/28933619/african-american-adults-and-seasonal-influenza-vaccination-changing-our-approach-can-move-the-needle
#2
Sandra Crouse Quinn
Consistent disparities in influenza (flu) vaccine uptake among African Americans, coupled with a disproportionate burden of chronic diseases, places too many African Americans at high risk for complications, hospitalizations and premature mortality. This disparity is the result of individual attitudes and beliefs, social norms, and health care practices. Recent research identifies critical factors affecting vaccine uptake among African American adults including perceived risk of vaccine side effects, social norms that do not support for vaccination, and lower knowledge of the flu and the vaccine...
September 21, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28931425/neutralizing-immune-responses-induced-by-oligomeric-h5n1-hemagglutinins-from-plants
#3
Hoang Trong Phan, Thuong Thi Ho, Ha Hoang Chu, Trang Huyen Vu, Ulrike Gresch, Udo Conrad
Plant-based transient expression is an alternative platform to produce hemagglutinin-based subunit vaccines. This production system provides not only fast and effective response in the context of a pandemic but also enables the supply of big volume vaccines at low cost. Crude plant extracts containing influenza hemagglutinin are considered to use as vaccine sources because of avoidance of related purification steps resulting in low cost production allowing veterinary applications. Highly immunogenic influenza hemagglutinins are urgently required to meet these pre-conditions...
September 20, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28930520/molecular-evolution-of-hemagglutinin-gene-of-influenza-a-virus
#4
Antara De
In the history of human civilization, influenza is the second most catastrophic killer disease for mankind with plague ranking first in the medieval times. The 1918-1919 'Spanish flu' killed 20-50 million people worldwide. According to a report from WHO, there have been four pandemics, several epidemics and recurrent seasonal outbreaks of influenza in different parts of the world. The virus is a potential bioterrorism threat with biological 'Chernobyl-like disaster' that occurred in Soviet Russia in 1977. Here, the author reviews the biology of the surface exposed hemagglutinin of the influenza virus, a gene under constant positive selection pressure to evade host immunity and vaccination...
January 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28925418/mhealth-application-areas-and-technology-combinations-a-comparison-of-literature-from-high-and-low-middle-income-countries
#5
Haitham Abaza, Michael Marschollek
BACKGROUND: With the continuous and enormous spread of mobile technologies, mHealth has evolved as a new subfield of eHealth. While eHealth is broadly focused on information and communication technologies, mHealth seeks to explore more into mobile devices and wireless communication. Since mobile phone penetration has exceeded other infrastructure in low and middle-income countries (LMICs), mHealth is seen as a promising component to provide pervasive and patient-centered care. OBJECTIVES: The aim of our research work for this paper is to examine the mHealth literature to identify application areas, target diseases, and mHealth service and technology types that are most appropriate for LMICs...
August 8, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28899847/enhancing-seasonal-influenza-surveillance-topic-analysis-of-widely-used-medicinal-drugs-using-twitter-data
#6
Ireneus Kagashe, Zhijun Yan, Imran Suheryani
BACKGROUND: Uptake of medicinal drugs (preventive or treatment) is among the approaches used to control disease outbreaks, and therefore, it is of vital importance to be aware of the counts or frequencies of most commonly used drugs and trending topics about these drugs from consumers for successful implementation of control measures. Traditional survey methods would have accomplished this study, but they are too costly in terms of resources needed, and they are subject to social desirability bias for topics discovery...
September 12, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28890192/workplace-availability-risk-group-and-perceived-barriers-predictive-of-2016-17-influenza-vaccine-uptake-in-the-united-states-a-cross-sectional-study
#7
Paula M Luz, Riley E Johnson, Heidi E Brown
BACKGROUND: Seasonal influenza, though mostly self-limited in the healthy adult, may lead to severe disease and/or complications in subpopulations. Annual influenza vaccination is available in many countries with coverage goals rarely being met. We conducted a cross-sectional study of influenza vaccine uptake and explored socio-demographic, economic, and psychological factors that explained vaccine uptake. METHODS: The survey was administered via Amazon Mechanical Turk (MTurk) to United States residents in January 2017, using the Qualtrics platform...
September 7, 2017: Vaccine
https://www.readbyqxmd.com/read/28886946/postmarketing-safety-surveillance-of-trivalent-recombinant-influenza-vaccine-reports-to-the-vaccine-adverse-event-reporting-system
#8
Emily Jane Woo, Pedro L Moro, Maria Cano, Christopher Jankosky
On January 16, 2013, the Food and Drug Administration approved recombinant hemagglutinin influenza vaccine (RIV3) (Spodoptera frugiperda cell line; Flublok), which is the first completely egg-free flu vaccine licensed in the United States. To improve our understanding of the safety profile of this vaccine, we reviewed and summarized reports to the Vaccine Adverse Event Reporting System (VAERS) following RIV3. Through June 30, 2016, VAERS received 88 reports. Allergic reactions, including anaphylaxis, were the most common type of adverse event...
September 5, 2017: Vaccine
https://www.readbyqxmd.com/read/28882967/influenza-among-breast-cancer-survivors-in-south-korea-a-nationwide-population-based-study
#9
Jaesung Heo, Mison Chun, Young-Taek Oh, O Kyu Noh, Logyoung Kim
BACKGROUND/AIM: In this study, we analyzed the prevalence of influenza disease in breast cancer survivors using claims data from the Health Insurance Review and Assessment Service (HIRA) in South Korea. PATIENTS AND METHODS: We defined influenza among a nationwide cohort of 87,843 patients who were diagnosed with breast cancer and underwent surgery from January 1, 2010 to December 31, 2014, based on HIRA claim data. Descriptive statistics were calculated to estimate the frequency of influenza disease using diagnostic code and utilization pattern at medical institutions...
September 2017: In Vivo
https://www.readbyqxmd.com/read/28877235/genetic-and-antigenic-characterization-of-influenza-a-h3n2-in-cameroon-during-the-2014-2016-influenza-seasons
#10
Gwladys C Monamele, Marie-Astrid Vernet, Mohammed R Njankouo, Kathleen Victoir, Jane Francis Akoachere, Damian Anong, Richard Njouom
The first outbreak of influenza A(H3N2) occurred in 1968 and caused the third flu pandemic of the 20th century. It has affected multiple countries over time. The best strategy to reduce the burden of influenza is through vaccination whose efficacy varies with respect to the circulating strains. This study was performed to better understand the molecular evolution of influenza A(H3N2) and assess vaccine efficacy in Cameroon. Complete sequences of three gene segments were obtained from 2014 to 2016 influenza seasons in Cameroon...
2017: PloS One
https://www.readbyqxmd.com/read/28874545/increasing-the-breadth-and-potency-of-response-to-the-seasonal-influenza-virus-vaccine-by-immune-complex-immunization
#11
Jad Maamary, Taia T Wang, Gene S Tan, Peter Palese, Jeffrey V Ravetch
The main barrier to reduction of morbidity caused by influenza is the absence of a vaccine that elicits broad protection against different virus strains. Studies in preclinical models of influenza virus infections have shown that antibodies alone are sufficient to provide broad protection against divergent virus strains in vivo. Here, we address the challenge of identifying an immunogen that can elicit potent, broadly protective, antiinfluenza antibodies by demonstrating that immune complexes composed of sialylated antihemagglutinin antibodies and seasonal inactivated flu vaccine (TIV) can elicit broadly protective antihemagglutinin antibodies...
September 5, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28874361/over-65s-flu-vaccination-programme-was-ineffective-data-show
#12
Nigel Hawkes
No abstract text is available yet for this article.
September 5, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28872773/exploring-provider-and-parental-perceptions-to-influenza-vaccination-in-the-inpatient-setting
#13
Suchitra Rao, Victoria Fischman, Angela Moss, Sonja I Ziniel, Michelle R Torok, Heidi McNeely, Daniel Hyman, Karen M Wilson, Amanda F Dempsey
BACKGROUND: Hospitalization provides an ideal opportunity for immunization, but few studies have explored provider and parental attitudes towards pediatric inpatient vaccination against influenza. OBJECTIVES: The objectives were to determine provider and caregiver attitudes and explore potential barriers to inpatient influenza vaccination. METHODS: We developed and distributed two surveys to parents/caregivers as well as providers of general pediatric inpatients at Children's Hospital Colorado between October 2014 and March 2015 assessing attitudes towards influenza and inpatient influenza vaccination...
September 5, 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/28869526/modulation-of-immunogenicity-and-conformation-of-ha1-subunit-of-influenza-a-virus-h1-n1-hemagglutinin-in-tubular-immunostimulating-complexes
#14
Nina Sanina, Ludmila Davydova, Natalia Chopenko, Eduard Kostetsky, Valery Shnyrov
The HA1 subunit of the influenza virus hemagglutinin (HA) is a valuable antigen for the development of vaccines against flu due to the availability of most antigenic sites which are conformational. Therefore, a novel adjuvanted antigen delivery system, tubular immunostimulating complexes (TI-complexes) comprising monogalactosyldiacylglycerol (MGDG) from different marine macrophytes as a lipid matrix for an antigen, was applied to enhance the immunogenicity of recombinant HA1 of influenza A H1N1 and to study the relation between its immunogenicity and conformation...
September 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28869502/a-review-of-the-safety-and-efficacy-of-vaccines-as-prophylaxis-for-clostridium-difficile-infections
#15
REVIEW
Mackenzie Henderson, Amanda Bragg, Germin Fahim, Monica Shah, Evelyn R Hermes-DeSantis
This review aims to evaluate the literature on the safety and efficacy of novel toxoid vaccines for the prophylaxis of Clostridium difficile infections (CDI) in healthy adults. Literature searches for clinical trials were performed through MEDLINE, ClinicalTrials.gov, and Web of Science using the keywords bacterial vaccines, Clostridium difficile, and vaccine. English-language clinical trials evaluating the efficacy and/or safety of Clostridium difficile toxoid vaccines that were completed and had results posted on ClinicalTrials...
September 2, 2017: Vaccines
https://www.readbyqxmd.com/read/28866291/a-single-dose-and-long-lasting-vaccine-against-pandemic-influenza-through-the-controlled-release-of-a-heterospecies-tandem-m2-sequence-embedded-within-detoxified-bacterial-outer-membrane-vesicles
#16
Hannah C Watkins, Catalina L Pagan, Hannah R Childs, Sara Posada, Annie Chau, Jose Rios, Cassandra Guarino, Matthew P DeLisa, Gary R Whittaker, David Putnam
The influenza A virus undergoes genetic drift and shift, leaving the general population susceptible to emerging pandemic strains, despite seasonal flu vaccination. Here we describe a single dose influenza vaccine derived from recombinant outer membrane vesicles (rOMVs) that display an antigen-mapped heterospecies tandem sequence of the M2 protein from the influenza A virus, released over 30days from poly(lactic-co-glycolide) (PLGA) microparticles. Four weeks post vaccination, BALB/c mice developed high anti-M2e IgG titers that were equivalent to those generated at 8weeks in a typical prime/boost vaccine regimen...
September 25, 2017: Vaccine
https://www.readbyqxmd.com/read/28863204/latest-recommendations-for-the-2017-2018-flu-season
#17
Doug Campos-Outcalt
This season's vaccine has a new H1N1 component and any vaccine, except the live attenuated virus formulation, is suitable for pregnant women.
September 2017: Journal of Family Practice
https://www.readbyqxmd.com/read/28859269/optimized-clade-2-3-2-1c-h5n1-recombinant-vaccine-strains-against-highly-pathogenic-avian-influenza
#18
Jin-Wook Jang, Chung-Young Lee, Il-Hwan Kim, Jun-Gu Choi, Youn-Jeong Lee, Seong-Su Yuk, Ji-Ho Lee, Chang-Seon Song, Jae-Hong Kim, Hyuk-Joon Kwon
A/Puerto Rico/8/34 (PR8)-derived recombinant viruses have been used for seasonal flu vaccines; however, they are insufficient for vaccines against some human-fatal H5N1 highly pathogenic avian influenza (HPAI) viruses (HPAIV) due to low productivity. Additionally, the polymerase basic 2 (PB2) protein, an important mammalian-pathogenicity determinant, of PR8 possesses several mammalian-pathogenic mutations. We previously reported two avian PB2 genes (01310 and 0028) related to efficient replication in embryonated chicken eggs (ECEs) and nonpathogenicity in BALB/c mice...
August 31, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28851282/psychological-determinants-of-influenza-vaccination
#19
Jens-Oliver Bock, André Hajek, Hans-Helmut König
BACKGROUND: Previous studies investigated the determinants of individuals' decision to vaccinate against influenza primarily focusing on social as well as certain proximal determinants, for example, behavioral beliefs. Thus, so far, the analysis of psychological factors as determinants of influenza vaccination was mainly limited to beliefs, attitudes or perceptions that were directly related to influenza vaccination and its perceived impact. However, considering general psychological factors, like general self-efficacy, optimism or subjective well-being, might further enhance the understanding of why certain people vaccinate while others do not...
August 29, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28841201/prevention-and-control-of-seasonal-influenza-with-vaccines-recommendations-of-the-advisory-committee-on-immunization-practices-united-states-2017-18-influenza-season
#20
Lisa A Grohskopf, Leslie Z Sokolow, Karen R Broder, Emmanuel B Walter, Joseph S Bresee, Alicia M Fry, Daniel B Jernigan
This report updates the 2016-17 recommendations of the Advisory Committee on Immunization Practices (ACIP) regarding the use of seasonal influenza vaccines (MMWR Recomm Rep 2016;65[No. RR-5]). Routine annual influenza vaccination is recommended for all persons aged ≥6 months who do not have contraindications. A licensed, recommended, and age-appropriate vaccine should be used.For the 2017-18 season, quadrivalent and trivalent influenza vaccines will be available. Inactivated influenza vaccines (IIVs) will be available in trivalent (IIV3) and quadrivalent (IIV4) formulations...
August 25, 2017: MMWR. Recommendations and Reports: Morbidity and Mortality Weekly Report. Recommendations and Reports
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