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Ciapponi A, Berrueta M, Argento FJ, Ballivian J, Bardach A, Brizuela ME, Castellana N, Comandé D, Gottlieb S, Kampmann B, Mazzoni A, Parker EPK, Sambade JM, Stegelmann K, Xiong X, Stergachis A, Buekens P. Safety and Effectiveness of COVID-19 Vaccines During Pregnancy: A Living Systematic Review and Meta-analysis. Drug Saf 2024:10.1007/s40264-024-01458-w. [PMID: 39009928 DOI: 10.1007/s40264-024-01458-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2024] [Indexed: 07/17/2024]
Abstract
BACKGROUND Pregnant persons are susceptible to significant complications following COVID-19, even death. However, worldwide COVID-19 vaccination coverage during pregnancy remains suboptimal. OBJECTIVE This study assessed the safety and effectiveness of COVID-19 vaccines administered to pregnant persons and shared this evidence via an interactive online website. METHODS We followed Cochrane methods to conduct this living systematic review. We included studies assessing the effects of COVID-19 vaccines in pregnant persons. We conducted searches every other week for studies until October 2023, without restrictions on language or publication status, in ten databases, guidelines, preprint servers, and COVID-19 websites. The reference lists of eligible studies were hand searched to identify additional relevant studies. Pairs of review authors independently selected eligible studies using the web-based software COVIDENCE. Data extraction and risk of bias assessment were performed independently by pairs of authors. Disagreements were resolved by consensus. We performed random-effects meta-analyses of adjusted relative effects for relevant confounders of comparative studies and proportional meta-analyses to summarize frequencies from one-sample studies using R statistical software. We present the GRADE certainty of evidence from comparative studies. Findings are available on an interactive living systematic review webpage, including an updated evidence map and real-time meta-analyses customizable by subgroups and filters. RESULTS We included 177 studies involving 638,791 participants from 41 countries. Among the 11 types of COVID-19 vaccines identified, the most frequently used platforms were mRNA (154 studies), viral vector (51), and inactivated virus vaccines (17). Low to very low-certainty evidence suggests that vaccination may result in minimal to no important differences compared to no vaccination in all assessed maternal and infant safety outcomes from 26 fewer to 17 more events per 1000 pregnant persons, and 13 fewer to 9 more events per 1000 neonates, respectively. We found statistically significant reductions in emergency cesarean deliveries (9%) with mRNA vaccines, and in stillbirth (75-83%) with mRNA/viral vector vaccines. Low to very low-certainty evidence suggests that vaccination during pregnancy with mRNA vaccines may reduce severe cases or hospitalizations in pregnant persons with COVID-19 (72%; 95% confidence interval [CI] 42-86), symptomatic COVID-19 (78%; 95% CI 21-94), and virologically confirmed SARS-CoV-2 infection (82%; 95% CI 39-95). Reductions were lower with other vaccine types and during Omicron variant dominance than Alpha and Delta dominance. Infants also presented with fewer severe cases or hospitalizations due to COVID-19 and laboratory-confirmed SARS-CoV-2 infection (64%; 95% CI 37-80 and 66%; 95% CI 37-81, respectively). CONCLUSIONS We found a large body of evidence supporting the safety and effectiveness of COVID-19 vaccines during pregnancy. While the certainty of evidence is not high, it stands as the most reliable option available, given the current absence of pregnant individuals in clinical trials. Results are shared in near real time in an accessible and interactive format for scientists, decision makers, clinicians, and the general public. This living systematic review highlights the relevance of continuous vaccine safety and effectiveness monitoring, particularly in at-risk populations for COVID-19 impact such as pregnant persons, during the introduction of new vaccines. CLINICAL TRIAL REGISTRATION PROSPERO: CRD42021281290.
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Affiliation(s)
- Agustín Ciapponi
- Argentine Cochrane Center, Institute for Clinical Effectiveness and Health Policy (IECS), Ravignani 2024, C1414CPV, Buenos Aires, Argentina.
- Centro de Investigaciones Epidemiológicas y Salud Pública (CIESP-IECS), CONICET, Buenos Aires, Argentina.
| | - Mabel Berrueta
- Department of Mother and Child Health, Institute for Clinical Effectiveness and Health Policy (IECS), Buenos Aires, Argentina
| | - Fernando J Argento
- Argentine Cochrane Center, Institute for Clinical Effectiveness and Health Policy (IECS), Ravignani 2024, C1414CPV, Buenos Aires, Argentina
| | - Jamile Ballivian
- Argentine Cochrane Center, Institute for Clinical Effectiveness and Health Policy (IECS), Ravignani 2024, C1414CPV, Buenos Aires, Argentina
| | - Ariel Bardach
- Argentine Cochrane Center, Institute for Clinical Effectiveness and Health Policy (IECS), Ravignani 2024, C1414CPV, Buenos Aires, Argentina
- Centro de Investigaciones Epidemiológicas y Salud Pública (CIESP-IECS), CONICET, Buenos Aires, Argentina
| | - Martin E Brizuela
- Argentine Cochrane Center, Institute for Clinical Effectiveness and Health Policy (IECS), Ravignani 2024, C1414CPV, Buenos Aires, Argentina
| | - Noelia Castellana
- Department of Mother and Child Health, Institute for Clinical Effectiveness and Health Policy (IECS), Buenos Aires, Argentina
| | - Daniel Comandé
- Argentine Cochrane Center, Institute for Clinical Effectiveness and Health Policy (IECS), Ravignani 2024, C1414CPV, Buenos Aires, Argentina
| | - Sami Gottlieb
- Department of Sexual and Reproductive Health and Research World Health Organization, Geneva, Switzerland
| | - Beate Kampmann
- London School of Hygiene & Tropical Medicine, London, UK
- Charite Centre for Global Health, Charité, Universitätsmedizin, Vaccine Centre, Berlin, Germany
| | - Agustina Mazzoni
- Department of Mother and Child Health, Institute for Clinical Effectiveness and Health Policy (IECS), Buenos Aires, Argentina
| | | | - Juan M Sambade
- Argentine Cochrane Center, Institute for Clinical Effectiveness and Health Policy (IECS), Ravignani 2024, C1414CPV, Buenos Aires, Argentina
| | - Katharina Stegelmann
- Argentine Cochrane Center, Institute for Clinical Effectiveness and Health Policy (IECS), Ravignani 2024, C1414CPV, Buenos Aires, Argentina
| | - Xu Xiong
- School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA
| | - Andy Stergachis
- Schools of Pharmacy and Public Health, University of Washington, Seattle, WA, USA
| | - Pierre Buekens
- School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA
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Buekens P, Berrueta M, Ciapponi A, Bardach A, Mazzoni A, Rodriguez-Cairoli F, Gottlieb SL, Kampmann B, Parker EPK, Xiong X, Zaraa S, Stergachis A. Safe in pregnancy: A global living systematic review and meta-analysis of COVID-19 vaccines in pregnancy. Vaccine 2024; 42:1414-1416. [PMID: 38341289 DOI: 10.1016/j.vaccine.2024.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 01/03/2024] [Accepted: 02/02/2024] [Indexed: 02/12/2024]
Affiliation(s)
- Pierre Buekens
- Department of Epidemiology, Tulane School of Public Health and Tropical Medicine, New Orleans, LA, USA.
| | - Mabel Berrueta
- Instituto de Efectividad Clínica y Sanitaria, Buenos Aires, Argentina
| | - Agustín Ciapponi
- Instituto de Efectividad Clínica y Sanitaria, Buenos Aires, Argentina; Center for Research in Epidemiology and Public Health, CONICET, Buenos Aires, Argentina
| | - Ariel Bardach
- Instituto de Efectividad Clínica y Sanitaria, Buenos Aires, Argentina; Center for Research in Epidemiology and Public Health, CONICET, Buenos Aires, Argentina
| | - Agustina Mazzoni
- Instituto de Efectividad Clínica y Sanitaria, Buenos Aires, Argentina
| | | | - Sami L Gottlieb
- Department of Sexual and Reproductive Health, World Health Organization, Geneva, Switzerland
| | - Beate Kampmann
- Vaccine Centre, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK; Charite Centre for Global Health, Charité Universitätsmedizin, Berlin, Germany
| | - Edward P K Parker
- Vaccine Centre, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Xu Xiong
- Department of Epidemiology, Tulane School of Public Health and Tropical Medicine, New Orleans, LA, USA
| | - Sabra Zaraa
- Comparative Health Outcomes, Policy, Economics (CHOICE) Institute, School of Pharmacy, University of Washington, Seattle, WA, USA
| | - Andy Stergachis
- Comparative Health Outcomes, Policy, Economics (CHOICE) Institute, School of Pharmacy, University of Washington, Seattle, WA, USA; Department of Global Health, School of Public Health, University of Washington, Seattle, WA, USA
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Ciapponi A, Berrueta M, P K Parker E, Bardach A, Mazzoni A, Anderson SA, Argento FJ, Ballivian J, Bok K, Comandé D, Goucher E, Kampmann B, Munoz FM, Rodriguez Cairoli F, Santa María V, Stergachis AS, Voss G, Xiong X, Zamora N, Zaraa S, Buekens PM. Safety of COVID-19 vaccines during pregnancy: A systematic review and meta-analysis. Vaccine 2023:S0264-410X(23)00332-8. [PMID: 37012114 PMCID: PMC10040368 DOI: 10.1016/j.vaccine.2023.03.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 03/09/2023] [Accepted: 03/20/2023] [Indexed: 03/29/2023]
Abstract
Background Assessment of COVID-19 vaccines safety during pregnancy is urgently needed. Methods We conducted a systematic review and meta-analysis to evaluate the safety of COVID-19 vaccines, including their components and technological platforms used in other vaccines during pregnancy and animal studies to complement direct evidence. We searched literature databases from its inception to September 2021 without language restriction, COVID-19 vaccine websites, and reference lists of other systematic reviews and the included studies. Pairs of reviewers independently selected, data extracted, and assessed the risk of bias of the studies. Discrepancies were resolved by consensus. (PROSPERO CRD42021234185). Results We retrieved 8,837 records from the literature search; 71 studies were included, involving 17,719,495 pregnant persons and 389 pregnant animals. Most studies (94%) were conducted in high-income countries, were cohort studies (51%), and 15% were classified as high risk of bias. We identified nine COVID-19 vaccine studies, seven involving 309,164 pregnant persons, mostly exposed to mRNA vaccines. Among non-COVID-19 vaccines, the most frequent exposures were AS03 and aluminum-based adjuvants. A meta-analysis of studies that adjusted for potential confounders showed no association with adverse outcomes, regardless of the vaccine or the trimester of vaccination. Neither the reported rates of adverse pregnancy outcomes nor reactogenicity exceeded expected background rates, which was the case for ASO3- or aluminum-adjuvanted non-COVID-19 vaccines in the proportion meta-analyses of uncontrolled studies/arms. The only exception was postpartum hemorrhage after COVID-19 vaccination (10.40%; 95% CI: 6.49-15.10%), reported by two studies; however, the comparison with non-exposed pregnant persons, available for one study, found non-statistically significant differences (adjusted OR 1.09; 95% CI 0.56-2.12). Animal studies showed consistent results with studies in pregnant persons. Conclusion We found no safety concerns for currently administered COVID-19 vaccines during pregnancy. Additional experimental and real-world evidence could enhance vaccination coverage. Robust safety data for non-mRNA-based COVID-19 vaccines are still needed.
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Affiliation(s)
- Agustín Ciapponi
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina.
| | - Mabel Berrueta
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina.
| | - Edward P K Parker
- The Vaccine Centre, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK.
| | - Ariel Bardach
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina.
| | - Agustina Mazzoni
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina.
| | - Steven A Anderson
- US Food & Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD 20993, USA.
| | - Fernando J Argento
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina.
| | - Jamile Ballivian
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina
| | - Karin Bok
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, 31 Center Dr # 7A03, Bethesda, MD 20892, USA.
| | - Daniel Comandé
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina.
| | - Erin Goucher
- School of Public Health and Tropical Medicine, Tulane University, New Orleans, USA.
| | - Beate Kampmann
- The Vaccine Centre, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK; Vaccines & Immunity Theme, MRC Unit The Gambia at the London School of Hygiene and Tropical Medicine, Banjul, the Gambia; Charité Centre for Global Health, Universitätsmedizin Charité Berlin, Germany.
| | - Flor M Munoz
- The Vaccine Centre, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK.
| | - Federico Rodriguez Cairoli
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina.
| | - Victoria Santa María
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina
| | - Andy S Stergachis
- School of Pharmacy and School of Public Health, University of Washington, 1959 NE Pacific St, BOX 357631, Seattle, WA, USA.
| | - Gerald Voss
- Coalition for Epidemic Preparedness Innovations (CEPI), Oslo, Norway.
| | - Xu Xiong
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, 31 Center Dr # 7A03, Bethesda, MD 20892, USA.
| | - Natalia Zamora
- Centro de Investigación de Epidemiología y Salud Pública (CIESP) - Instituto de Efectividad Clínica y Sanitaria (IECS-CONICET), Argentina
| | - Sabra Zaraa
- Baylor College of Medicine, Texas Children's Hospital, 6621 Fannin St, Houston, TX 77030, USA.
| | - Pierre M Buekens
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, 31 Center Dr # 7A03, Bethesda, MD 20892, USA.
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