1
|
Bottero D, Rudi E, Martin Aispuro P, Zurita E, Gaillard E, Gonzalez Lopez Ledesma MM, Malito J, Stuible M, Ambrosis N, Durocher Y, Gamarnik AV, Wigdorovitz A, Hozbor D. Heterologous booster with a novel formulation containing glycosylated trimeric S protein is effective against Omicron. Front Immunol 2023; 14:1271209. [PMID: 38022542 PMCID: PMC10667599 DOI: 10.3389/fimmu.2023.1271209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023] Open
Abstract
In this study, we evaluated the efficacy of a heterologous three-dose vaccination schedule against the Omicron BA.1 SARS-CoV-2 variant infection using a mouse intranasal challenge model. The vaccination schedules tested in this study consisted of a primary series of 2 doses covered by two commercial vaccines: an mRNA-based vaccine (mRNA1273) or a non-replicative vector-based vaccine (AZD1222/ChAdOx1, hereafter referred to as AZD1222). These were followed by a heterologous booster dose using one of the two vaccine candidates previously designed by us: one containing the glycosylated and trimeric spike protein (S) from the ancestral virus (SW-Vac 2µg), and the other from the Delta variant of SARS-CoV-2 (SD-Vac 2µg), both formulated with Alhydrogel as an adjuvant. For comparison purposes, homologous three-dose schedules of the commercial vaccines were used. The mRNA-based vaccine, whether used in heterologous or homologous schedules, demonstrated the best performance, significantly increasing both humoral and cellular immune responses. In contrast, for the schedules that included the AZD1222 vaccine as the primary series, the heterologous schemes showed superior immunological outcomes compared to the homologous 3-dose AZD1222 regimen. For these schemes no differences were observed in the immune response obtained when SW-Vac 2µg or SD-Vac 2µg were used as a booster dose. Neutralizing antibody levels against Omicron BA.1 were low, especially for the schedules using AZD1222. However, a robust Th1 profile, known to be crucial for protection, was observed, particularly for the heterologous schemes that included AZD1222. All the tested schedules were capable of inducing populations of CD4 T effector, memory, and follicular helper T lymphocytes. It is important to highlight that all the evaluated schedules demonstrated a satisfactory safety profile and induced multiple immunological markers of protection. Although the levels of these markers were different among the tested schedules, they appear to complement each other in conferring protection against intranasal challenge with Omicron BA.1 in K18-hACE2 mice. In summary, the results highlight the potential of using the S protein (either ancestral Wuhan or Delta variant)-based vaccine formulation as heterologous boosters in the management of COVID-19, particularly for certain commercial vaccines currently in use.
Collapse
Affiliation(s)
- Daniela Bottero
- Laboratorio VacSal, Instituto de Biotecnología y Biología Molecular (IBBM), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Centro Científico Tecnológico – Consejo Nacional de Investigaciones Científicas y Técnicas (CCT-CONICET), La Plata, Argentina
| | - Erika Rudi
- Laboratorio VacSal, Instituto de Biotecnología y Biología Molecular (IBBM), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Centro Científico Tecnológico – Consejo Nacional de Investigaciones Científicas y Técnicas (CCT-CONICET), La Plata, Argentina
| | - Pablo Martin Aispuro
- Laboratorio VacSal, Instituto de Biotecnología y Biología Molecular (IBBM), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Centro Científico Tecnológico – Consejo Nacional de Investigaciones Científicas y Técnicas (CCT-CONICET), La Plata, Argentina
| | - Eugenia Zurita
- Laboratorio VacSal, Instituto de Biotecnología y Biología Molecular (IBBM), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Centro Científico Tecnológico – Consejo Nacional de Investigaciones Científicas y Técnicas (CCT-CONICET), La Plata, Argentina
| | - Emilia Gaillard
- Laboratorio VacSal, Instituto de Biotecnología y Biología Molecular (IBBM), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Centro Científico Tecnológico – Consejo Nacional de Investigaciones Científicas y Técnicas (CCT-CONICET), La Plata, Argentina
| | - Maria M. Gonzalez Lopez Ledesma
- Fundación Instituto Leloir-Instituto de Investigaciones Bioquímicas de Buenos Aires (IIBBA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Juan Malito
- INCUINTA Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), HURLINGHAM, Instituto Nacional de Tecnología Agropecuaria (INTA) Castelar, Buenos Aires, Argentina
| | - Matthew Stuible
- Human Health Therapeutics Research Center, National Research Council Canada, Montreal, QC, Canada
| | - Nicolas Ambrosis
- Laboratorio VacSal, Instituto de Biotecnología y Biología Molecular (IBBM), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Centro Científico Tecnológico – Consejo Nacional de Investigaciones Científicas y Técnicas (CCT-CONICET), La Plata, Argentina
| | - Yves Durocher
- Human Health Therapeutics Research Center, National Research Council Canada, Montreal, QC, Canada
| | - Andrea V. Gamarnik
- Fundación Instituto Leloir-Instituto de Investigaciones Bioquímicas de Buenos Aires (IIBBA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Andrés Wigdorovitz
- INCUINTA Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), HURLINGHAM, Instituto Nacional de Tecnología Agropecuaria (INTA) Castelar, Buenos Aires, Argentina
| | - Daniela Hozbor
- Laboratorio VacSal, Instituto de Biotecnología y Biología Molecular (IBBM), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Centro Científico Tecnológico – Consejo Nacional de Investigaciones Científicas y Técnicas (CCT-CONICET), La Plata, Argentina
| |
Collapse
|
2
|
Paramithiotis E, Sugden S, Papp E, Bonhomme M, Chermak T, Crawford SY, Demetriades SZ, Galdos G, Lambert BL, Mattison J, McDade T, Pillet S, Murphy R. Cellular Immunity Is Critical for Assessing COVID-19 Vaccine Effectiveness in Immunocompromised Individuals. Front Immunol 2022; 13:880784. [PMID: 35693815 PMCID: PMC9179228 DOI: 10.3389/fimmu.2022.880784] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 04/12/2022] [Indexed: 12/28/2022] Open
Abstract
COVID-19 vaccine clinical development was conducted with unprecedented speed. Immunity measurements were concentrated on the antibody response which left significant gaps in our understanding how robust and long-lasting immune protection develops. Better understanding the cellular immune response will fill those gaps, especially in the elderly and immunocompromised populations which not only have the highest risk for severe infection, but also frequently have inadequate antibody responses. Although cellular immunity measurements are more logistically complex to conduct for clinical trials compared to antibody measurements, the feasibility and benefit of doing them in clinical trials has been demonstrated and so should be more widely adopted. Adding significant cellular response metrics will provide a deeper understanding of the overall immune response to COVID-19 vaccination, which will significantly inform vaccination strategies for the most vulnerable populations. Better monitoring of overall immunity will also substantially benefit other vaccine development efforts, and indeed any therapies that involve the immune system as part of the therapeutic strategy.
Collapse
Affiliation(s)
| | - Scott Sugden
- Scientific Team, CellCarta, Montreal, QC, Canada
| | - Eszter Papp
- Global Research and Development, CellCarta, Montreal, QC, Canada
| | - Marie Bonhomme
- Vaccine Sciences Division, Pharmaceutical Product Development (PPD) Inc., Wilmington, NC, United States
| | - Todd Chermak
- Regulatory and Government Affairs, CellCarta, Montreal, QC, Canada
| | - Stephanie Y. Crawford
- Department of Pharmacy Systems, Outcomes and Policy, University of Illinois Chicago, Chicago, IL, United States
| | | | - Gerson Galdos
- Robert J. Havey, MD Institute for Global Health, Northwestern University, Chicago, IL, United States
| | - Bruce L. Lambert
- Center for Communication and Health, Northwestern University, Evanston, IL, United States
| | - John Mattison
- Health Information, Kaiser Permanente, Pasadena, CA, United States
- Health Technology Advisory Board, Arsenal Capital, New York, NY, United States
| | - Thomas McDade
- Department of Anthropology, Northwestern University, Evanston, IL, United States
| | | | - Robert Murphy
- Robert J. Havey, MD Institute for Global Health, Northwestern University, Chicago, IL, United States
| |
Collapse
|
3
|
Mortezaee K, Majidpoor J. CD8 + T Cells in SARS-CoV-2 Induced Disease and Cancer-Clinical Perspectives. Front Immunol 2022; 13:864298. [PMID: 35432340 PMCID: PMC9010719 DOI: 10.3389/fimmu.2022.864298] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/07/2022] [Indexed: 12/13/2022] Open
Abstract
Dysregulated innate and adaptive immunity is a sign of SARS-CoV-2-induced disease and cancer. CD8+ T cells are important cells of the immune system. The cells belong to the adaptive immunity and take a front-line defense against viral infections and cancer. Extreme CD8+ T-cell activities in the lung of patients with a SARS-CoV-2-induced disease and within the tumor microenvironment (TME) will change their functionality into exhausted state and undergo apoptosis. Such diminished immunity will put cancer cases at a high-risk group for SARS-CoV-2-induced disease, rendering viral sepsis and a more severe condition which will finally cause a higher rate of mortality. Recovering responses from CD8+ T cells is a purpose of vaccination against SARS-CoV-2. The aim of this review is to discuss the CD8+ T cellular state in SARS-CoV-2-induced disease and in cancer and to present some strategies for recovering the functionality of these critical cells.
Collapse
Affiliation(s)
- Keywan Mortezaee
- Department of Anatomy, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Jamal Majidpoor
- Department of Anatomy, Faculty of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
| |
Collapse
|
4
|
Piadel K, Haybatollahi A, Dalgleish AG, Smith PL. Selection and T-cell antigenicity of synthetic long peptides derived from SARS-CoV-2. J Gen Virol 2022; 103. [PMID: 35014605 PMCID: PMC8895615 DOI: 10.1099/jgv.0.001698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The pandemic caused by SARS-CoV-2 has led to the successful development of effective vaccines however the prospect of variants of SARS-CoV-2 and future coronavirus outbreaks necessitates the investigation of other vaccine strategies capable of broadening vaccine mediated T-cell responses and potentially providing cross-immunity. In this study the SARS-CoV-2 proteome was assessed for clusters of immunogenic epitopes restricted to diverse human leucocyte antigen. These regions were then assessed for their conservation amongst other coronaviruses representative of different alpha and beta coronavirus genera. Sixteen highly conserved peptides containing numerous HLA class I and II restricted epitopes were synthesized from these regions and assessed in vitro for their antigenicity against T-cells from individuals with previous SARS-CoV-2 infection. Monocyte derived dendritic cells were generated from these peripheral blood mononuclear cells (PBMC), loaded with SARS-CoV-2 peptides, and used to induce autologous CD4+ and CD8+ T cell activation. The SARS-CoV-2 peptides demonstrated antigenicity against the T-cells from individuals with previous SARS-CoV-2 infection indicating that this approach holds promise as a method to activate anti-SAR-CoV-2 T-cell responses from conserved regions of the virus which are not included in vaccines utilising the Spike protein.
Collapse
Affiliation(s)
- Katarzyna Piadel
- Institute of Infection and Immunity, St Georges University of London, London UK
| | - Amin Haybatollahi
- Institute of Infection and Immunity, St Georges University of London, London UK
| | | | | |
Collapse
|
5
|
Kanokudom S, Assawakosri S, Suntronwong N, Auphimai C, Nilyanimit P, Vichaiwattana P, Thongmee T, Yorsaeng R, Srimuan D, Thatsanatorn T, Klinfueng S, Sudhinaraset N, Wanlapakorn N, Honsawek S, Poovorawan Y. Safety and Immunogenicity of the Third Booster Dose with Inactivated, Viral Vector, and mRNA COVID-19 Vaccines in Fully Immunized Healthy Adults with Inactivated Vaccine. Vaccines (Basel) 2022; 10:86. [PMID: 35062747 PMCID: PMC8779615 DOI: 10.3390/vaccines10010086] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 12/16/2022] Open
Abstract
The coronavirus disease 2019 (COVID-19) pandemic has become a severe healthcare problem worldwide since the first outbreak in late December 2019. Currently, the COVID-19 vaccine has been used in many countries, but it is still unable to control the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, despite patients receiving full vaccination doses. Therefore, we aimed to appraise the booster effect of the different platforms of vaccines, including inactivated vaccine (BBIBP), viral vector vaccine (AZD122), and mRNA vaccine (BNT162b2), in healthy adults who received the full dose of inactivated vaccine (CoronaVac). The booster dose was safe with no serious adverse events. Moreover, the immunogenicity indicated that the booster dose with viral vector and mRNA vaccine achieved a significant proportion of Ig anti-receptor binding domain (RBD), IgG anti-RBD, and IgA anti-S1 booster response. In contrast, inactivated vaccine achieved a lower booster response than others. Consequently, the neutralization activity of vaccinated serum had a high inhibition of over 90% against SARS-CoV-2 wild-type and their variants (B.1.1.7-alpha, B.1.351-beta, and B.1.617.2-delta). In addition, IgG anti-nucleocapsid was observed only among the group that received the BBIBP booster. Our study found a significant increase in levels of IFN-ɣ secreting T-cell response after the additional viral vector or mRNA booster vaccination. This study showed that administration with either viral vector (AZD1222) or mRNA (BNT162b2) boosters in individuals with a history of two doses of inactivated vaccine (CoronaVac) obtained great immunogenicity with acceptable adverse events.
Collapse
Affiliation(s)
- Sitthichai Kanokudom
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
- Osteoarthritis and Musculoskeleton Research Unit, Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Suvichada Assawakosri
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
- Osteoarthritis and Musculoskeleton Research Unit, Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Nungruthai Suntronwong
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Chompoonut Auphimai
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Pornjarim Nilyanimit
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Preeyaporn Vichaiwattana
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Thanunrat Thongmee
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Ritthideach Yorsaeng
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Donchida Srimuan
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Thaksaporn Thatsanatorn
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Sirapa Klinfueng
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Natthinee Sudhinaraset
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Nasamon Wanlapakorn
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
| | - Sittisak Honsawek
- Osteoarthritis and Musculoskeleton Research Unit, Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Yong Poovorawan
- Center of Excellence in Clinical Virology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (S.K.); (S.A.); (N.S.); (C.A.); (P.N.); (P.V.); (T.T.); (R.Y.); (D.S.); (T.T.); (S.K.); (N.S.); (N.W.)
- The Royal Society of Thailand (FRS(T)), Sanam Sueapa, Dusit, Bangkok 10330, Thailand
| |
Collapse
|
6
|
Mattoo SUS, Myoung J. A Promising Vaccination Strategy against COVID-19 on the Horizon: Heterologous Immunization. J Microbiol Biotechnol 2021; 31:1601-1614. [PMID: 34949742 PMCID: PMC9705928 DOI: 10.4014/jmb.2111.11026] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 12/13/2021] [Accepted: 12/17/2021] [Indexed: 12/15/2022]
Abstract
To overcome the ongoing COVID-19 pandemic, vaccination campaigns are the highest priority of majority of countries. Limited supply and worldwide disproportionate availability issues for the approved vaccines, together with concerns about rare side-effects have recently initiated the switch to heterologous vaccination, commonly known as mixing of vaccines. The COVID-19 vaccines are highly effective in the general population. However, none of the vaccines is 100% efficacious or effective, with variants posing more challenges, resulting in breakthrough cases. This review summarizes the current knowledge of immune responses to variants of concern (VOC) and breakthrough infections. Furthermore, we discuss the scope of heterologous vaccination and future strategies to tackle the COVID-19 pandemic, including fractionation of vaccine doses and alternative route of vaccination.
Collapse
Affiliation(s)
- Sameer-ul-Salam Mattoo
- Korea Zoonosis Research Institute, Department of Bioactive Material Science and Genetic Engineering Research Institute, Jeonbuk National University, Jeonju 54531, Republic of Korea
| | - Jinjong Myoung
- Korea Zoonosis Research Institute, Department of Bioactive Material Science and Genetic Engineering Research Institute, Jeonbuk National University, Jeonju 54531, Republic of Korea,Corresponding author Phone: +82-63-9004055 Fax: +82-63-9004012 E-mail:
| |
Collapse
|
7
|
Alhashimi M, Elkashif A, Sayedahmed EE, Mittal SK. Nonhuman Adenoviral Vector-Based Platforms and Their Utility in Designing Next Generation of Vaccines for Infectious Diseases. Viruses 2021; 13:1493. [PMID: 34452358 PMCID: PMC8402644 DOI: 10.3390/v13081493] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/25/2021] [Accepted: 07/26/2021] [Indexed: 01/01/2023] Open
Abstract
Several human adenoviral (Ad) vectors have been developed for vaccine delivery owing to their numerous advantages, including the feasibility of different vector designs, the robustness of elicited immune responses, safety, and scalability. To expand the repertoire of Ad vectors for receptor usage and circumvention of Ad vector immunity, the use of less prevalent human Ad types or nonhuman Ads were explored for vector design. Notably, many nonhuman Ad vectors have shown great promise in preclinical and clinical studies as vectors for vaccine delivery. This review describes the key features of several nonhuman Ad vector platforms and their implications in developing effective vaccines against infectious diseases.
Collapse
Affiliation(s)
| | | | | | - Suresh K. Mittal
- Immunology and Infectious Disease, and Purdue University Center for Cancer Research, Department of Comparative Pathobiology, Purdue Institute for Inflammation, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907-2027, USA; (M.A.); (A.E.); (E.E.S.)
| |
Collapse
|
8
|
Abstract
As the COVID-19 vaccination programme starts to be rolled out, many young women are hesitant to accept the vaccine, citing concerns about fertility. Meanwhile, those offered the vaccine during pregnancy must decide whether they will accept, even though pregnant people were excluded from the clinical trials. Data on accidental pregnancies that occurred during the trials and, increasingly, outcomes in pregnant people who receive the vaccine can help these groups to make informed decisions. Reassuring data from accidental pregnancies that have occurred in the clinical trials of approved COVID-19 vaccines indicate that vaccination does not harm fertility or increase the rate of miscarriage.
Collapse
|