Background: Heterologous prime-boost vaccination potentially augments the immune response against SARS-CoV-2 in liver transplant (LT) recipients. We investigated immunogenicity induced by different primary prime-boost vaccination protocols and the subsequent response to the booster vaccine among LT recipients. Methods: LT recipients, who received primary immunisation with ChAdOx1/ChAdOx1 or ChAdOx1/BNT162b2, were administered the third dose of mRNA-1273 three months following the primary vaccination. Blood samples were collected before and after primary vaccination and post-booster. The levels of receptor binding domain antibody (anti-RBD) and neutralising antibody (sVNT) and spike-specific T-cell responses were assessed. Results: Among the 89 LT recipients, patients receiving ChAdOx1/BNT162b2 had significantly higher anti-RBD titres, sVNT, and cellular response after primary vaccination than those receiving ChAdOx1/ChAdOx1 (p < 0.05). The antibody response decreased 12 weeks after the primary vaccination. After the booster, humoral and cellular responses significantly improved, with comparable seroconversion rates between the heterologous and homologous groups. Positive sVNT against the wild type occurred in >90% of LT patients, with only 12.3% positive against the Omicron variant. Conclusions: ChAdOx1/BNT162b2 evoked a significantly higher immunological response than ChAdOx1/ChAdOx1 in LT recipients. The booster strategy substantially induced robust immunity against wild type in most patients but was less effective against the Omicron strain.
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http://dx.doi.org/10.3390/vaccines10122126 | DOI Listing |
Hum Vaccin Immunother
December 2025
Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, China.
Human papillomavirus (HPV) vaccination could reduce HPV infection in men who have sex with men (MSM), but the published statistics on HPV vaccination uptake in MSM were scarce globally. This study estimated the uptake and profiled the service preferences of HPV vaccination of Chinese MSM in Hong Kong. Adult MSM were recruited through non-governmental organizations (NGOs) and online channels for completing an online baseline survey.
View Article and Find Full Text PDFBMC Med
December 2024
Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology & Population Health, London, School of Hygiene and Tropical Medicine, London, UK.
Background: Direct oral anticoagulants (DOACs) have been reported to be associated with a higher risk of mortality compared with an older alternative, warfarin using primary care data in the United Kingdom (UK). However, other studies observed contradictory findings. We therefore aimed to investigate the association between mortality and warfarin, compared with DOACs.
View Article and Find Full Text PDFBMC Med Ethics
December 2024
Takemi Program in International Health, Harvard T.H. Chan School of Public Health, Harvard University, 665 Huntington Avenue, Bldg. 1, Boston, MA, 02115-6021, USA.
Health equity matters, but there is no universally accepted definition of this or associated terms, such as inequities, inequalities, and disparities. Given the flexibility of these terms, investigating how policymakers understand them is important to observe priorities and perhaps course correct. Accordingly, this study analyzed the perceptions high-level policymakers within the WHO African Region.
View Article and Find Full Text PDFCancer Control
December 2024
Department of Pathology and Microbiology, School of Medicine, University of Zambia, Lusaka, Zambia.
Background: Despite Zambia implementing the World Health Organisation's (WHO) tri-pillar cervical cancer prevention goals 90-70-90 Prevent, Screen, and Treat, cervical cancer claims 2000 lives annually and reigns as the most common cancer among women, especially those living with HIV (WLHIV). Our study describes the national uptake of screening and treatment from the ZAMPHIA 2021 survey.
Methods: Utilising a two-stage cluster sampling approach, the study included participants aged 15 years and older across Zambia's ten provinces.
Lancet Microbe
December 2024
Amsterdam University Medical Centres, Amsterdam, Netherlands; Department of Global Health and Amsterdam Institute for Global Health and Development, Amsterdam, Netherlands.
Background: Tuberculosis vaccine trials using disease as the primary endpoint are large, time consuming, and expensive. An earlier immunological measure of the protection against disease would accelerate tuberculosis vaccine development. We aimed to assess whether the effectiveness of the Bacillus Calmette-Guérin (BCG) vaccine for prevention of Mycobacterium tuberculosis infection was consistent with that for prevention of tuberculosis disease.
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