Publications by authors named "Samaha H"

Immunisation is a high priority for improving health outcomes. Yet, in many low-income and middle-income countries, achieving coverage targets independently is hindered by lack of domestic resources and reliance on partners' support. Both the 2001 Abuja Declaration and 2016 Addis Declaration were key political commitments to improving immunisation coverage; however, many signatories have yet to meet international targets.

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  • Prostate cancer is a major health issue for men globally, and in Lebanon, there's limited research on how factors like age, digital rectal exams (DRE), and urinary symptoms relate to prostate-specific antigen (PSA) levels.
  • A study involving 725 Lebanese men aged 55-70 found that older age correlated with higher PSA levels, and men with more severe urinary symptoms also had elevated PSA levels.
  • The results suggest that age-specific PSA reference ranges are necessary, and combining PSA testing with clinical evaluations can improve prostate cancer detection in Lebanon.
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Vaccine-preventable diseases (VPDs) pose a serious public health concern for people living with HIV (PLH). PLH experience a delayed and weakened response to many vaccines available, compared to the general population. Lower seroconversion rates, along with a decreased efficacy and durability of vaccines, increases the susceptibility of PLH to VPDs.

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Background And Objectives: Massive transfusion protocols (MTPs) are critical in managing haemorrhage, yet their utilization varies. There is lack of data on the utilization of MTPs in the Middle East and North Africa (MENA) region. This study aims to assess the degree of utilization of MTPs in the region.

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Vaccine adjuvants increase the breadth of serum antibody responses, but whether this is due to the generation of antigen-specific B cell clones with distinct specificities or the maturation of memory B cell clones that produce broadly cross-reactive antibodies is unknown. Here, we longitudinally analyzed immune responses in healthy adults after two-dose vaccination with either a virus-like particle COVID-19 vaccine (CoVLP), CoVLP adjuvanted with AS03 (CoVLP+AS03), or a messenger RNA vaccination (mRNA-1273). CoVLP+AS03 enhanced the magnitude and durability of circulating antibodies and antigen-specific CD4 T cell and memory B cell responses.

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Aim: To evaluate the serum levels of HMGB1, IL1β, and α-klotho in COVID-19 patients with different disease severity, investigate their association with clinicopathological parameters, and to assess HMGB1 rs1045411 polymorphism and its relation with clinical severity.

Methods: 120 COVID-19 patients (89 critically ill, 15 severe, and 16 moderately severe) along with 80 healthy control were enrolled.The serum levels of HMGB1,IL1β, and α-klotho were determined by ELISA.

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Post-acute sequelae of SARS-CoV-2 (PASC) is a significant public health concern. We describe Patient Reported Outcomes (PROs) on 590 participants prospectively assessed from hospital admission for COVID-19 through one year after discharge. Modeling identified 4 PRO clusters based on reported deficits (minimal, physical, mental/cognitive, and multidomain), supporting heterogenous clinical presentations in PASC, with sub-phenotypes associated with female sex and distinctive comorbidities.

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Introduction: The COVID-19 pandemic is a serious threat to everyone's health. Numerous studies have demonstrated that vaccines are very effective in preventing COVID-19-related severe illness, hospitalization, and death. Children's vaccination exerts its protecting effect by preventing the spread of the virus.

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The 10th Ebola virus disease (EVD) outbreak in the Democratic Republic of the Congo (DRC) drew substantial attention from the international community, which in turn invested more than US$1 billion in EVD control over two years (2018-2020). This is the first EVD outbreak to take place in a conflict area, which led to a shift in strategy from a pure public health response (PHR) to a multisectoral humanitarian response. A wide range of disease control and mitigation activities were implemented and were outlined in the five budgeted Strategic Response Plans used throughout the 26 months.

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Background: Health systems' weakness remains one of the primary obstacles towards achieving universal access to quality healthcare in low-income settings. Performance-based financing (PBF) programs have been increasingly used to increase access to quality care in LMICs. However, evidence on the impacts of these programs remains fragmented and inconclusive.

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Article Synopsis
  • Vaccine protection against SARS-CoV-2 diminishes over time, making updated boosters necessary, as assessed in a phase 2 clinical trial with various mRNA and protein-based vaccines targeting multiple variants.* -
  • The trial measured safe levels of immunity by evaluating pseudovirus neutralization and found that variant-containing vaccines performed better than wild-type ones against different strains.* -
  • Updated vaccines targeting variants like Beta or Omicron BA.1 show strong neutralizing antibody responses across various SARS-CoV-2 strains while still maintaining immunity to the original virus.*
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Neuropathic pain (NP) is a sensory, emotional, and persistent disturbing experience caused by a lesion or disease of the somatosensory system which can lead when chronic to comorbidities such as anxiety and depression. Available treatments (pharmacotherapy, neurostimulation) have partial and unpredictable response; therefore, it seems necessary to find a new therapeutical approach that could alleviate most related symptoms and improve patients 'emotional state'. Posterior Insula seems to be a potential target of neurostimulation for pain relief.

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People living with HIV (PLH) experience higher rates of HPV infection as well as an increased risk of HPV-related disease, including malignancies. Although they are considered a high-priority group for HPV vaccination, there are limited data regarding the long-term immunogenicity and efficacy of HPV vaccines in this population. Seroconversion rates and geometric mean titers elicited by vaccination are lower in PLH compared to immunocompetent participants, especially in individuals with CD4 counts below 200 cells/mm and a detectable viral load.

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Vaccine protection against COVID-19 wanes over time and has been impacted by the emergence of new variants with increasing escape of neutralization. The COVID-19 Variant Immunologic Landscape (COVAIL) randomized clinical trial (clinicaltrials.gov NCT05289037) compares the breadth, magnitude and durability of antibody responses induced by a second COVID-19 vaccine boost with mRNA (Moderna mRNA-1273 and Pfizer-BioNTech BNT162b2), or adjuvanted recombinant protein (Sanofi CoV2 preS DTM-AS03) monovalent or bivalent vaccine candidates targeting ancestral and variant SARS-CoV-2 spike antigens (Beta, Delta and Omicron BA.

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BackgroundThe SARS-CoV-2 Omicron BA.5 subvariant escapes vaccination-induced neutralizing antibodies because of mutations in the spike (S) protein. Solid organ transplant recipients (SOTRs) develop high COVID-19 morbidity and poor Omicron variant recognition after COVID-19 vaccination.

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Kidney transplant recipients (KTRs) show poorer response to SARS-CoV-2 mRNA vaccination, yet response patterns and mechanistic drivers following third doses are ill-defined. We administered third monovalent mRNA vaccines to n = 81 KTRs with negative or low-titer anti-receptor binding domain (RBD) antibody (n = 39 anti-RBD; n = 42 anti-RBD), compared with healthy controls (HCs, n = 19), measuring anti-RBD, Omicron neutralization, spike-specific CD8%, and SARS-CoV-2-reactive T cell receptor (TCR) repertoires. By day 30, 44% anti-RBD remained seronegative; 5% KTRs developed BA.

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BackgroundMaintaining durable immunity following vaccination represents a major challenge, but whether mRNA booster vaccination improves durability is unknown.MethodsWe measured antibody responses in 55 healthy adults, who received a booster dose of the Pfizer-BioNTech or Moderna vaccine against SARS-CoV-2 and calculated the half-life of the antibody titers. We also measured memory B and T cell responses in a subset of 28 participants.

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Objective: The aim of this study was to examine the effect of adding weight shift training to a weight loss program on the risk of falling, fear of falling, overall stability, anteroposterior stability, mediolateral stability, and isometric knee torque in young obese women.

Design: A single-blinded, randomized controlled study was performed. Sixty women, 18 to 46 yrs old, were randomly assigned either to the study or the control group.

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Waning immunity to vaccination represents a major challenge in vaccinology. Whether booster vaccination improves the durability of immune responses is unknown. Here we show, using a cohort of 55 adult vaccinees who received the BNT162b2 (Pfizer-BioNTech) or mRNA-1273 (Moderna) vaccine against SARS-CoV-2, that a booster (i.

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The emergence of the highly divergent SARS-CoV-2 Omicron variant has jeopardized the efficacy of vaccines based on the ancestral spike. The bivalent COVID-19 mRNA booster vaccine within the United States is comprised of the ancestral and the Omicron BA.5 spike.

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Background: Protection from SARS-CoV-2 vaccines wanes over time and is compounded by emerging variants including Omicron subvariants. This study evaluated safety and immunogenicity of SARS-CoV-2 variant vaccines.

Methods: This phase 2 open-label, randomized trial enrolled healthy adults previously vaccinated with a SARS-CoV-2 primary series and a single boost.

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The topography of vascular and valvular calcification could help accurately predict cardiovascular post-operative complications. The data on these calcifications remains scarce. Identify the topographic distribution of the ascending aortic, left heart valves and coronary calcifications.

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Background: Despite increasing access to health care, under-5 mortality remains high in many parts of Sub-Saharan Africa. Interventions to improve quality of care have mostly focused on additional training for medical staff, but generally shown little impact. We will assess the impact of financially incentivized quarterly provider knowledge assessment on compliance with Integrated Management of Childhood Illness (IMCI) protocols in Congo, DRC.

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