SARS-CoV-2: An Overview of Virus Genetics, Transmission, and Immunopathogenesis

Mohamed A. Farrag, Haitham M. Amer, Rauf Bhat, Maaweya E. Hamed, Ibrahim M. Aziz, Ayman Mubarak, Turki M Dawoud, Sami G Almalki, Fayez Alghofaili, Ahmad K. Alnemare, Raid Saleem Al-Baradi, Bandar Alosaimi and Wael Alturaiki
Additional contact information
Mohamed A. Farrag: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Haitham M. Amer: Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt
Rauf Bhat: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Maaweya E. Hamed: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Ibrahim M. Aziz: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Ayman Mubarak: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Turki M Dawoud: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Sami G Almalki: Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia
Fayez Alghofaili: Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia
Ahmad K. Alnemare: Otolaryngology Department, College of Medicine, Majmaah University, Majmaah 11952, Saudi Arabia
Raid Saleem Al-Baradi: Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia
Bandar Alosaimi: Research Center, King Fahad Medical City, Riyadh 11525, Saudi Arabia
Wael Alturaiki: Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952, Saudi Arabia

IJERPH, 2021, vol. 18, issue 12, 1-14

Abstract: The human population is currently facing the third and possibly the worst pandemic caused by human coronaviruses (CoVs). The virus was first reported in Wuhan, China, on 31 December 2019 and spread within a short time to almost all countries of the world. Genome analysis of the early virus isolates has revealed high similarity with SARS-CoV and hence the new virus was officially named SARS-CoV-2. Since CoVs have the largest genome among all RNA viruses, they can adapt to many point mutation and recombination events; particularly in the spike gene, which enable these viruses to rapidly change and evolve in nature. CoVs are known to cross the species boundaries by using different cellular receptors. Both animal reservoir and intermediate host for SARS-CoV-2 are still unresolved and necessitate further investigation. In the current review, different aspects of SARS-CoV-2 biology and pathogenicity are discussed, including virus genetics and evolution, spike protein and its role in evolution and adaptation to novel hosts, and virus transmission and persistence in nature. In addition, the immune response developed during SARS-CoV-2 infection is demonstrated with special reference to the interplay between immune cells and their role in disease progression. We believe that the SARS-CoV-2 outbreak will not be the last and spillover of CoVs from bats will continue. Therefore, establishing intervention approaches to reduce the likelihood of future CoVs spillover from natural reservoirs is a priority.

Keywords: coronavirus; COVID-19; cross-species transmission; evolution; immune response; SARS-CoV-2 (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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