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An analytical cross-sectional study on optimal (timely or cumulative age-appropriate) routine childhood immunization coverage in the communities of Ebonyi state, Nigeria.
Sci Rep
January 2025
Department of Anaesthesia, Alex Ekwueme Federal University Teaching Hospital Abakaliki (AEFUTHA), Abakaliki, Ebonyi State, Nigeria.
Optimal (timely or cumulative age-appropriate) routine childhood immunization coverage (the receipt of every recommended vaccine dose at the recommended age and time-interval between doses) will enhance optimal protection against vaccine-preventable infectious diseases (VPDs) which have been causing significant morbidity and mortality and recurring outbreaks among children younger than five years. This study evaluated optimal routine childhood immunization coverage, and the predictors, in Ebonyi state, Nigeria. This study was a baseline cross-sectional household survey within a cluster-randomised controlled trial and was conducted from July 2 to 16, 2022 among consenting mother-child pairs, in which the children were aged 5-23 months (subdivided into 5-11 and 12-23 months), in 16 randomly selected geographical clusters where the primary health care (PHC) facilities were providing maternal and child health care services including weekly routine childhood immunization.
View Article and Find Full Text PDFVaccine efficacy of NVX-CoV2373 against SARS-CoV-2 infection in adolescents in the USA: an ancillary study to a phase 3, observer-blinded, randomised, placebo-controlled trial.
Lancet Microbe
January 2025
Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA. Electronic address:
Background: Although existing COVID-19 vaccines are known to be highly effective against severe disease and death, data are needed to assess their ability to reduce SARS-CoV-2 infection. We aimed to estimate the efficacy of the NVX-CoV2373 protein subunit vaccine against SARS-CoV-2 infection, regardless of symptoms, among adolescents.
Methods: We performed an ancillary observational study (SNIFF) to the phase 3, observer-blinded, randomised, placebo-controlled PREVENT-19 trial that assessed vaccine efficacy against symptomatic COVID-19 in the USA.
A Phase 3B, Open-Label Study to Evaluate the Immunogenicity and Safety of the Quadrivalent Meningococcal Nimenrix Vaccine When Given to Healthy Infants at 3 and 12 Months of Age.
Infect Dis Ther
January 2025
Vaccine Research and Development, Pfizer R&D UK Ltd, Marlow, UK.
Introduction: Infants and young children typically have the highest age-related risk of invasive meningococcal disease. The immunogenicity and safety of a single primary dose and a booster of a meningococcal A/C/W/Y tetanus toxoid conjugate vaccine (MenACWY-TT; Nimenrix) in infants were evaluated.
Methods: In this phase 3b, open-label, single-arm study, healthy 3-month-old infants received a single Nimenrix dose followed by a booster at age 12 months (1 + 1 series).
Rethinking Optimal Immunogens to Face SARS-CoV-2 Evolution Through Vaccination.
Influenza Other Respir Viruses
January 2025
Área de Investigación en Vacunas, Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana, Valencia, Spain.
SARS-CoV-2, which originated in China in late 2019, quickly fueled the global COVID-19 pandemic, profoundly impacting health and the economy worldwide. A series of vaccines, mostly based on the full SARS-CoV-2 Spike protein, were rapidly developed, showing excellent humoral and cellular responses and high efficacy against both symptomatic infection and severe disease. However, viral evolution and the waning humoral neutralizing responses strongly challenged vaccine long term effectiveness, mainly against symptomatic infection, making necessary a strategy of repeated and updated booster shots.
View Article and Find Full Text PDFRecombinant XBB.1.5 boosters induce robust neutralization against KP.2- and KP.3-included JN.1 sublineages.
Signal Transduct Target Ther
January 2025
Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, Sichuan, 610041, People's Republic of China.
The newly emerged variants of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) demonstrate resistance to present therapeutic antibodies as well as the capability to evade vaccination-elicited antibodies. JN.1 sublineages were demonstrated as one of the most immune-evasive variants, showing higher neutralization resistance compared to XBB.
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