Vaccine最新文献

{"title":"Effectiveness of BNT162b2 and Ad26.COV2.S vaccines against COVID-19-related hospitalisation amongst adult members of a private health insurance plan in South Africa during the Delta and Omicron periods: A test-negative case-control study.","authors":"Siobhan L Johnstone, Daniel Shapiro, Nicola Chiwandire, Lundi Matoti, Carmen Whyte, Jolene Bultinck-Human, Selaelo Mametja, Craig Getz, Boldwin Moyo, Mabatlo Semenya, Sibongile Walaza, Cheryl Cohen, Michelle J Groome","doi":"10.1016/j.vaccine.2025.127068","DOIUrl":"https://doi.org/10.1016/j.vaccine.2025.127068","url":null,"abstract":"<p><strong>Background: </strong>COVID-19 vaccine effectiveness estimates from Africa are limited. These data can guide decisions on selecting priority groups in vaccine programs. This study estimated VE for BNT162b2 and Ad26.COV2.S against COVID-19-related hospitalisation, stratified by age group, time since vaccination, and HIV-infection status for three SARS-CoV-2 surges in South Africa.</p><p><strong>Methods: </strong>We applied a test-negative case-control design to hospitalisations for acute respiratory infections amongst members of a medical insurance plan during the delta (9 May 2021-18 September 2021), omicron BA.1 (28 November 2021-5 February 2022), and BA.4/5 (17 April 2022-28 May 2022) variant periods. All data, including vaccination history, were extracted from insurance plan claims. Logistic regression models adjusted for age, comorbidities, time since vaccination, income level and documentation of previous SARS-CoV-2 infection, were used to calculate VE.</p><p><strong>Results: </strong>BNT162b2 was protective against COVID-19-related hospitalisation for all variant periods (VE 89.3 % (95 % CI, 85.9-91.9) for delta, reduced to 31.4 % (95 % CI, 19.1-41.9) and 22.7 % (95 % CI, 2.2-38.9) for omicron BA.1, and BA.4/5 respectively). VE estimates for Ad26.COV2·S, although lower than BNT162b2, were protective for all periods (48.8 % (95 % CI, 39.6-56.5), 19.8 % (95 % CI, 5.8-31.6), and 45.0 % (95 % CI, 29.8-57.0) for delta, omicron BA.1, and BA.4/5 respectively). Protection against severe infection was shown in those ≥60 years and younger age groups, as well as in people living with HIV (PLWH) and HIV-uninfected individuals.</p><p><strong>Conclusion: </strong>Vaccination offered significant protection against COVID-19-related hospitalisation in PLWH and the elderly, and is therefore an effective means of reducing severe outcomes in these high-risk populations in South Africa. VE against BA.4/5 waned with time since vaccination suggesting boosters may be necessary.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":" ","pages":"127068"},"PeriodicalIF":0.0,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Challenges and enablers to establishing COVID-19 vaccine effectiveness studies in the World Health Organization Africa region: A mixed-methods evaluation of the African region monitoring vaccine effectiveness (AFRO-MoVE) network.","authors":"Adam W Crawley, Katherine Murphy, Ian D Plumb, Grace Adjoa Ocansey, Isaac Baffoe-Nyarko, Norman Nyazema, Sibongile Walaza, Eva Leidman","doi":"10.1016/j.vaccine.2025.126823","DOIUrl":"10.1016/j.vaccine.2025.126823","url":null,"abstract":"<p><strong>Background: </strong>The African Region Monitoring Vaccine Effectiveness network (AFRO-MoVE) was established by the World Health Organization Regional Office for Africa in March 2021 to support implementation of COVID-19 vaccine effectiveness studies in the region.</p><p><strong>Objectives: </strong>Primary goals of the evaluation were to assess how AFRO-MoVE addressed its objectives supporting regional vaccine effectiveness (VE) studies, to describe challenges and opportunities, and make recommendations to strengthen future efforts related to regional VE research.</p><p><strong>Methods: </strong>From September 2023 through June 2024, a mixed-methods approach was employed to synthesize information from: (1) documentation provided by AFRO-MoVE; (2) a standardized study review tool; (3) an electronic stakeholder survey; and (4) a series of key informant interviews. Data were collected and exported via REDCap and summarized using Microsoft Excel. Thematic analysis was used to analyse the qualitative data. Perceived challenges were summarized together with perceived support by the network in addressing each challenge.</p><p><strong>Results: </strong>AFRO-MoVE provided support to ten VE studies, including support for protocol development, study implementation, data management, and analysis, while also facilitating knowledge exchange and experience sharing among study implementers. While respondents reported strengthened capacity for VE studies at the national and regional levels in these areas, enrollment of SARS-CoV-2 positive cases was challenging, due to a decline in reported cases in network countries in mid-2022, when many studies were launched. These challenges contributed to a lack of published VE estimates from network study sites in time to inform vaccine policy.</p><p><strong>Conclusion: </strong>AFRO-MoVE technical assistance and financial support was viewed positively by network members and contributed to increased capacity for conducting VE studies in the region. Publication of study results would further bolster the impact of the network. These finding underscore opportunities to enhance capacity for rapid VE generation and support preparedness for future pandemics.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":" ","pages":"126823"},"PeriodicalIF":3.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12468252/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of COVID-19 vaccines against laboratory-confirmed SARS-CoV-2 infection amongst health workers, Windhoek, Namibia.","authors":"Kaveto Sikuvi, Natasha Nghitukwa, Ndiitodino Kakehongo, Ismael Katjitae, Carolina Matos, Philip Oedi, Sibongile Manga Netha, Emmanuel Nepolo, Christian Winter","doi":"10.1016/j.vaccine.2025.126977","DOIUrl":"https://doi.org/10.1016/j.vaccine.2025.126977","url":null,"abstract":"<p><strong>Introduction: </strong>As of 24 October 2021, 128,868 laboratory-confirmed COVID-19 cases and 3550 deaths were reported from Namibia. The national COVID-19 vaccination campaign that started in March 2021 included health workers (HWs) as a priority group. The vaccines most administered were Sinopharm, AstraZeneca, Pfizer-BioNtech, and Janssen. We aimed to measure the effectiveness of COVID-19 vaccines (VE) amongst HWs against laboratory-confirmed SARS-CoV-2 infection in Namibia.</p><p><strong>Methods: </strong>We conducted a test negative design (TND) amongst HWs from the two main hospitals treating COVID-19 patients. HWs were defined as all hospital staff over 18 years in direct or indirect contact with patients, eligible for COVID-19 vaccination. We interviewed actively recruited HWs with standardized questionnaires in-person from 25/10/2021 to 25/4/2022. The participants had to state their vaccination status, which was verified through vaccination card, vaccine registry and/or District Health Information System 2. RT-PCR testing of respiratory specimens and serological testing (Wantai and Platelia-ELISA) were conducted. We measured VE by comparing the vaccination status between RT-PCR positive and negative HWs using a multivariable logistic regression model, which was adjusted for confounders. We calculated VE = (1-odds ratio of vaccination)*100 %.</p><p><strong>Results: </strong>We included 1201 HWs of which 322 (26.8 %) participants were fully vaccinated with a primary series against COVID-19, 62 (5.2 %) were partially vaccinated and 735 (61.2 %) were not vaccinated. In total, 1119 (93 %) participants had antibodies against SARS-CoV-2 including 637 (90 %) of the unvaccinated participants. Fifty-eight (4.8 %) participants tested RT-PCR positive for SARS-CoV-2. The Omicron variant was detected in all 13 sequenced genomes (11 BA.1.18, 2 BA.1). The estimated overall VE for full vaccination was 61.8 % (95 %-confidence interval, 9.3-83.9 %).</p><p><strong>Conclusions: </strong>The VE results suggest that COVID-19 vaccines used in Namibia provided good protection from infections with the Omicron variant even if many participants had a SARS-CoV-2 infection before the study. Therefore, COVID-19 vaccines should be administered to risk groups such as HWs independent from previous infections.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":" ","pages":"126977"},"PeriodicalIF":0.0,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143617613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of COVID-19 vaccine against SARS-CoV-2 infection among symptomatic COVID-19 patients in Uganda.","authors":"Andrew M Abaasa, Sylvia Kusemererwa, Violet Ankunda, Terry A Ongaria, Bernadette Nayiga, Ayoub Kakande, Deogratius Ssemwanga, Geofrey Kimbugwe, Henry K Bosa, Yonas T Woldemariam, Annet Kisakye, James Humphreys, Archibald K Worwui, Sandra Cohuet, Jason M Mwenda, Alison M Elliott, Pontiano Kaleebu, Eugene Ruzagira","doi":"10.1016/j.vaccine.2025.126976","DOIUrl":"10.1016/j.vaccine.2025.126976","url":null,"abstract":"<p><strong>Background: </strong>COVID-19 vaccines significantly reduce severe disease outcomes, but uncertainty remains about long-term protection. We investigated vaccine effectiveness (VE) against SARS-CoV-2 infection over extended periods in the World Health Organisation AFRO-MoVE network studies in Africa.</p><p><strong>Methods: </strong>Participants with COVID-19-like symptoms were recruited between 2023 and 2024 for a test-negative case-control study conducted across 19-healthcare centres in Uganda. Cases were symptomatic patients with any three of cough, sore-throat, coryza, among others, and PCR-confirmed SARS-CoV-2, while controls were SARS-CoV-2 PCR-negative. Vaccination was verified from vaccination cards, hospital-records, vaccination registry and self-reporting. VE was assessed through three measures: (a) Annual - patients vaccinated in the past 12-months regardless of dose vs those vaccinated >12-months before symptom onset plus unvaccinated; (b) Absolute - patients vaccinated in the past 12-months vs unvaccinated; and (c) Relative - patients vaccinated in the past 12-months vs those vaccinated >12-months before symptom onset. VE was calculated as 1- adjusted odds ratio for three patient groups based on days since the last dose; (1) <365, (2) 7-269 and (3) 270-364 while adjusting for age, sex, calendar-time and chronic conditions. The sensitivity analysis excluded patients that were previously infected with SARS-CoV-2.</p><p><strong>Findings: </strong>In total, 1371 patients, 56 % female were recruited. Of these, 173 were classified as cases, with 97 (56 %) fully vaccinated compared to 701 (59 %) controls, p = 0.830. The overall adjusted VE was moderate, 45 % to 59 %, and remained consistent across the annual, absolute and relative measures. Sensitivity analysis showed consistently lower VE (32 % to 38 %) across all measures.</p><p><strong>Interpretation: </strong>The results suggest that COVID-19 vaccination provides moderate protection against symptomatic SARS-CoV-2 infection up to 12-months after the last dose and highlight the importance of up-to-date vaccinations for high-risk individuals. The lack of clear COVID-19 seasonality in this and other African settings creates a challenge to selecting the optimal timing for annual vaccination.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":" ","pages":"126976"},"PeriodicalIF":0.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143588817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"COVID-19 vaccination status and associated factors among patients presenting with COVID-19-like symptoms in Uganda.","authors":"Sylvia Kusemererwa, Violet Ankunda, Terry A Ongaria, Andrew Abaasa, Ayoub Kakande, Deogratius Ssemwanga, Geofrey Kimbugwe, Bernadette Nayiga, Henry K Bosa, Alfred Driwale, Yonas T Woldemariam, Annet Kisakye, James Humphreys, Archibald K Worwui, Sandra Cohuet, Jason M Mwenda, Alison M Elliott, Pontiano Kaleebu, Eugene Ruzagira","doi":"10.1016/j.vaccine.2025.126984","DOIUrl":"10.1016/j.vaccine.2025.126984","url":null,"abstract":"<p><strong>Introduction: </strong>The emergence of new SARS-CoV-2 variants threatens the effectiveness of global vaccination campaigns. This study examines the vaccination status and associated factors among patients presenting with COVID-19-like symptoms at 19 healthcare facilities in Uganda.</p><p><strong>Materials and methods: </strong>A cross-sectional analysis was conducted using data collected at health facilities to evaluate the effectiveness of COVID-19 vaccines in Uganda from March 2023 to March 2024. Participants were individuals aged 12 years and older with COVID-19-like symptoms who underwent a SARS-CoV-2 qPCR test within 10 days of symptom onset. The study involved obtaining informed consent, collecting medical and vaccination histories (confirmed using vaccination cards and Ministry of Health COVID-19 database), performing physical examinations, administering a questionnaire, and taking oral/nasopharyngeal swabs for SARS-CoV-2 qPCR testing. Vaccination coverage was defined as receiving at least one vaccine dose. Logistic regression was used to identify factors associated with vaccination status.</p><p><strong>Results: </strong>Among 1398 participants enrolled (55.4 % female), the median age was 30.0 years (IQR: 24.0-41.0). Vaccination coverage, was 66.6 %. Residing in Wakiso district compared to the Capital, Kampala was associated with a higher likelihood of vaccination (adjusted odds ratio [aOR] = 1.4, 95 % CI: 1.0-1.8, p = 0.021). Frontline and healthcare workers were more likely to be vaccinated (aOR = 5.0, 95 % CI: 3.6-7.3, p < 0.001), as were individuals with a previous COVID-19 diagnosis (aOR = 2.4, 95 % CI: 1.6-3.9, p < 0.001).</p><p><strong>Conclusions: </strong>Our results underscore the need for targeted public health messaging and support to promote vaccination, especially among non-healthcare workers. Addressing these gaps is crucial for maintaining high vaccination coverage and mitigating the impact of new SARS-CoV-2 variants on the population.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":" ","pages":"126984"},"PeriodicalIF":0.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143588816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors associated with mortality among patients aged 12 years and above requiring hospitalization for severe respiratory illness (SRI): Findings from the COVID-19 vaccine effectiveness evaluation in Kenya and Mali, 2022-2023.","authors":"Brian O Onyando, Bryan O Nyawanda, Daniel Onguru, Fadima C Haidara, Collins Okello, Raphael O Anyango, Ian K Orege, Sidney Ogolla, Billy Ogwel, Alex O Awuor, Samuel Kadivane, Philip Ngere, Carolyne Nasimiyu, Eric Osoro, M Kariuki Njenga, Victor Akelo, Amos Otedo, Shirley Lidechi, John B Ochieng, Nancy A Otieno, Erick M O Muok, Kibet Sergon, Archibald Kwame Worwui, Goitom G Weldegebriel, Isabel Bergeri, Cohuet Sandra, Celine Gurry, J Pekka Nuorti, Patrick Amoth, Rose Jalang'o, Jason M Mwenda, Richard Omore, Samba O Sow","doi":"10.1016/j.vaccine.2025.126910","DOIUrl":"10.1016/j.vaccine.2025.126910","url":null,"abstract":"<p><strong>Background: </strong>Mortality attributed to respiratory illnesses is well characterized in children <5 years. However, there is paucity of data among older populations. Here, we leveraged data from the COVID-19 Vaccine Effectiveness Evaluation to establish the factors associated with mortality among patients with severe respiratory illness (SRI) in Kenya and Mali.</p><p><strong>Methods: </strong>We enrolled patients (≥ 12 years) requiring hospitalization for SRI, defined as acute onset (≤ 14 days) of at least two of the following: cough, fever (reported/measured temperature of ≥38 °C), chills, rigors, myalgia, headache, sore throat, fatigue, congestion or runny nose, loss of taste or smell, or pneumonia diagnosis, from referral hospitals in Kenya and Mali. We collected demographic, clinical characteristics of the patients, and nasopharyngeal and oropharyngeal specimens for SARS-CoV-2 testing using RT-PCR. A mixed-effects logistic regression model was fitted to identify factors associated with 30-day mortality among patients with SRI.</p><p><strong>Results: </strong>Between July 2022 and October 2023 9947 SRI patients were enrolled, of whom 9743 were included in this analysis and 1620 (16.6 %) died (Kenya: 1533/7822 [20.0 %]; Mali: 87/1921 [4.5 %]). Compared to patients aged 12-24 years, those aged >64 years were more likely to die (adjusted Odds Ratio [aOR] = 2.36; 95 % Confidence Interval [95 % CI] 1.72-3.24). Patients who were in coma (aOR = 3.45; 95 %CI 2.27-5.24) or Intensive Care Unit (aOR = 2.98; 95 %CI 2.06-4.31), or had HIV infection (aOR = 2.47; 95 %CI 2.11-2.90), liver disease (aOR = 2.42; 95 %CI 1.57-3.74), cancer (aOR = 2.09; 95 %CI 1.46-2.99) or SARS-CoV-2 infected (aOR = 1.24; 95 %CI 1.02-1.52) were at increased risk of death. Additionally, diarrhea, malaise/fatigue, difficulty in breathing, confusion, mechanical ventilation, vasopressor support, malnutrition and admission to High Dependency Unit had significant associations.</p><p><strong>Conclusion: </strong>Mortality was heightened among SRI patients who were older, required critical care, had chronic conditions and infected with SARS-CoV-2 suggesting need for early identification of these conditions to improve possible treatment outcomes.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":" ","pages":"126910"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-year follow-up evaluation of approved Subolesin anti-tick vaccine in Uganda.","authors":"Paul D Kasaija, Fredrick Kabi, Jimmy Semakula, Ivan Kyakuwa, Marinela Contreras, Gabriela de la Fuente, Justus Rutaisire, Swidiq Mugerwa, Christian Gortázar, José de la Fuente","doi":"10.1016/j.vaccine.2024.126562","DOIUrl":"10.1016/j.vaccine.2024.126562","url":null,"abstract":"<p><p>After approval of the Subolesin-based anti-tick vaccine in Uganda, we completed a one-year follow-up evaluation study. The results showed significantly 2.1-5.0-fold higher anti-SUB IgG antibody titers in vaccinated cattle in Mbarara and Maruzi with vaccine effectiveness higher than 95 %. In Mbarara, total number of ticks were 0.8-fold lower in vaccinated cattle with a negative correlation tendency between anti-SUB antibody titers and tick counts. The CCHFV-seropositive cattle significantly decreased in 40 % in SUB-vaccinated animals with a significant positive correlation between CCHFV-seropositive cattle and the total number of ticks per animal and a negative correlation tendency between anti-SUB antibody titers and CCHFV-seropositive cattle. A boosting vaccine dose yearly after primary vaccination with three doses is sufficient to maintain protective antibody titers against ticks and tick-borne diseases affecting human and animal health. These results are relevant for implementation of anti-tick Subolesin-based vaccines in Uganda and other countries in Sub-Saharan Africa.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":"44 ","pages":"126562"},"PeriodicalIF":3.5,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142755946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"COVID-19 vaccine responses are influenced by distinct risk factors in naive and SARS-CoV-2 experienced hemodialysis recipients.","authors":"Nicolas Gemander, Delphine Kemlin, Stéphanie Depickère, Natasha S Kelkar, Shilpee Sharma, Pieter Pannus, Alexandra Waegemans, Véronique Olislagers, Daphnée Georges, Emilie Dhondt, Margarida Braga, Leo Heyndrickx, Johan Michiels, Anaïs Thiriard, Anne Lemy, Thomas Baudoux, Marylène Vandevenne, Maria E Goossens, André Matagne, Isabelle Desombere, Kevin K Ariën, Margaret E Ackerman, Alain Le Moine, Arnaud Marchant","doi":"10.1016/j.vaccine.2024.126544","DOIUrl":"10.1016/j.vaccine.2024.126544","url":null,"abstract":"<p><strong>Background: </strong>Clinical risk factors of deficient immune responses to COVID-19 mRNA vaccination in SARS-CoV-2 naive hemodialysis recipients (HDR) have already been identified. Clinical factors influencing hybrid immunity induced by SARS-CoV-2 infection and vaccination in HDR have not been reported.</p><p><strong>Methods: </strong>A comprehensive analysis of antibody (Ab) and T cell responses to two doses of BNT162b2 mRNA vaccination was performed in 103 HDR, including 75 SARS-CoV-2 naive and 28 experienced patients, and in 106 healthy controls (HC) not undergoing HD, including 40 SARS-CoV-2 naive and 66 experienced subjects. Clinical risk factors associated with lower humoral and cellular immunity were analyzed in SARS-CoV-2 naive and experienced HDR by univariate and multivariate analyses.</p><p><strong>Results: </strong>Naive HDR had lower neutralizing and non-neutralizing antibody responses to vaccination than naive HC; lower vaccine responses were correlated with previous transplantation, immunosuppressive treatment, corticosteroid treatment, hypoalbuminemia, older age, hypertension, and negative response to hepatitis B vaccination. In contrast, vaccine responses of SARS-CoV-2 experienced HDR were similar to those of HC and were correlated with time between infection and vaccination and with previous transplantation, but not with the other risk factors associated with lower vaccine responses in naive HDR.</p><p><strong>Conclusion: </strong>COVID-19 vaccine responses are influenced by distinct risk factors in SARS-CoV-2 naive and experienced HDR. These observations have important implications for the understanding of vaccine-induced immunity and for the management of this vulnerable patient population.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":"44 ","pages":"126544"},"PeriodicalIF":3.5,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11655250/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142752391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating parental perceptions of respiratory syncytial virus (RSV) and attitudes to RSV vaccine in Jiangsu, China: Insights from a cross-section study.","authors":"Qiang Wang, Liuqing Yang, Lan Li, Shixin Xiu, Min Yang, Xuwen Wang, Yuan Shen, Weibing Wang, Leesa Lin","doi":"10.1016/j.vaccine.2024.126570","DOIUrl":"10.1016/j.vaccine.2024.126570","url":null,"abstract":"<p><strong>Introduction: </strong>Our study aimed to assess parents' perceptions of respiratory syncytial virus (RSV) and their attitudes towards the RSV vaccine in China.</p><p><strong>Method: </strong>The cross-section study was performed between August 21 and November 15, 2023, in Jiangsu province, eastern China. We collected socio-demographics, awareness, knowledge, perceptions of susceptibility and severity of RSV, and attitudes towards RSV vaccine using online survey questionnaire from parents of child aged ≤14 years old. The chi-square test and logistic regression model to explore the associated factors.</p><p><strong>Results: </strong>A total of 2135 participants were included. About 26.0 % indicated that they had never heard of RSV (556/2135) and were unaware that infants and young children are at a high risk of contracting RSV (557/2135). The proportion of parents with a child under 1 year of age who were unaware of RSV was notably higher than that of parents with children in other age groups. 42.9 % of parents (916/2135) showed low level of perceived susceptibility of contacting RSV infection for their child. 70.6 % of parents (1508/2135) expressed their willingness to vaccinate their child against RSV. The most common reason for refusing the RSV vaccine was \"Concern about vaccine's safety or side effects.\" 60.8 % of participants (1299/2135) considered a price of the RSV vaccine below 200 CNY (28 USD) as acceptable.</p><p><strong>Conclusion: </strong>The parents, particularly those with younger children, exhibited limited awareness and knowledge regarding RSV infection. Our study also showed the potential role of vaccine price as a barrier to the future use of RSV vaccine in China.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":"44 ","pages":"126570"},"PeriodicalIF":3.5,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Establishing the African region monitoring vaccine effectiveness (AFRO-MoVE) network for respiratory pathogens.","authors":"C E Gurry, J M Mwenda, A Nardone, S Cohuet, A Worwui, M Valenciano, H C Lewis, C S Wiysonge, R Katsande, R Mukaro, F Braka, A S Gueye, T Balde, I Bergeri, B Impouma","doi":"10.1016/j.vaccine.2024.126616","DOIUrl":"10.1016/j.vaccine.2024.126616","url":null,"abstract":"<p><p>Population-level vaccination with newly developed vaccines to respond to the COVID-19 pandemic created a need to monitor vaccine effectiveness (VE) in the context of emerging SARS-CoV-2 variants and changing epidemiology. WHO and partners launched the African Region Monitoring Vaccine Effectiveness (AFRO-MoVE) Network in March 2021 to assess the performance of COVID-19 vaccines in real-world conditions in Africa. The Network aimed to facilitate and support comparable COVID-19 vaccine effectiveness studies in the African region, to provide a platform of scientific expertise and infrastructure, encourage the use of robust similar study designs to enable pooling to produce regional VE estimates and to build a sustainable network of hospitals, institutions, and experts to evaluate vaccines against pandemic and endemic respiratory pathogens. In the two years since its inception, the network has coordinated VE studies in the region and provided technical guidance and generic protocols employing robust methodologies. It brought together over 200 experts, representing 22 African countries and 55 organisations, and strengthened capacities by hosting ten webinars and six technical workshops. Of the 55 partners organisations, 25 based in 13 countries collaborated on implementing VE studies in the region. AFRO-MoVE supported study implementation in two phases, first targeting COVID-19 vaccination priority groups, then the general population. The network provides technical and financial support to nine studies, including three cohort studies in health workers and adults with comorbidities, and six test-negative design studies evaluating VE against symptomatic and severe disease. A data platform was established for pooled regional estimates. The AFRO-MoVE Network can form a sustainable platform to provide data for evidence informed decisions and timely VE monitoring for existing and new vaccines against respiratory pathogens and other diseases in the African region. Further development and consolidation of the network's activities can enable rapid response to future epidemics and pandemics.</p>","PeriodicalId":94264,"journal":{"name":"Vaccine","volume":" ","pages":"126616"},"PeriodicalIF":0.0,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142916757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}