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Panminerva Medica 2020 May 26

DOI: 10.23736/S0031-0808.20.03958-0

Copyright © 2020 EDIZIONI MINERVA MEDICA

lingua: Inglese

The vaccine journey for COVID-19: a comprehensive systematic review of current clinical trials in humans

Enrico CHECCUCCI 1 , Federico PIRAMIDE 1, Angela PECORARO 1, Daniele AMPARORE 1, Riccardo CAMPI 2, 3, Cristian FIORI 1, Oussama ELHAGE 4, Pinky KOTECHA 4, Annapurna VYAKARNAM 4, Sergio SERNI 2, 3, Prokar DASGUPTA 4, Francesco PORPIGLIA 1

1 Department of Oncology, School of Medicine, San Luigi Hospital, University of Turin, Orbassano, Turin, Italy; 2 Unit of Urological Robotic Surgery and Renal Transplantation, Careggi Hospital, University of Florence; 3 Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy; 4 King’s College London, Guy’s Hospital, Faculty of Life Sciences and Medicine, London, UK


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INTRODUCTION: Since December 2019, there has been an outbreak of a novel beta-coronavirus (SARS-CoV-2) in Wuhan, China. On March the 11th the World Health Organization (WHO) declared COVID-19 as a pandemic, with over 118,000 cases in more than 110 countries around the world. In response to the global coronavirus disease 2019 (COVID-19) emergency, clinical trial research assessing the efficacy and safety of experimental vaccines to prevent COVID-19 are emerging at an unprecedented rate. The aim of this systematic review is to summarize the preliminary experiences and ongoing clinical trials of the major candidates and challenges of the vaccine strategies in humans.
EVIDENCE ACQUISITION: After a priori protocol registration with PROSPERO (181483), a systematic research of the published literature was conducted on 24 April 2020 using Medline (via PubMed), Embase (via Ovid), and WHO databases. Moreover, to explore the more recent literature we also searched the preprint server medRxiv. Finally, we scrutinized the Cochrane COVID-19 study register and the COVID-19 section of ClinicalTrials.gov database for identifying relevant ongoing clinical trials. Thereafter we selected the articles according to the PRISMA guidelines. Animal or in-vitro experimental studies were excluded. Moreover editorials, commentaries, abstracts, reviews, book chapters, and articles not in English were not included.
EVIDENCE SYNTHESIS: Our search identified 1359 published papers, 478 pre-print articles and 367 ongoing clinical trials. Finally, only ten ongoing clinical trials met the inclusion criteria. Specifically, seven developed vaccines for the S protein of SARS-CoV-2 and three clinical trials assessed the protective role of BCG vaccine against COVID-19. The first group included phase I/II trials with different types of molecules (DNA or mRNA vaccine, bacterial plasmid or viral vectors), the latter were phase III/IV trials designed on the basis of a heterologous lymphocyte activation by the BCG vaccine.
CONCLUSIONS: This new disease is pushing the scientific community to develop swiftly a safe and effective vaccine. Notwithstanding the limitations of our analysis, given by the absence of available results, we try to provide a comprehensive view of the ongoing clinical trials in humans. Our analysis reveals a worldwide effort of both scientists and enterprises to achieve one of the most challenging goals of our century.


KEY WORDS: COVID-19; SARS-CoV-2; Vaccine; Immunization; BCG; Pandemic

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