Publication:
Emerging SARS-CoV-2 variants can potentially break set epidemiological barriers in COVID-19

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dc.contributor.authorKumar, Ashutosh
dc.contributor.authorParashar, Rakesh
dc.contributor.authorKumar, Sujeet
dc.contributor.authorFaiq, Muneeb A
dc.contributor.authorKumari, Chiman
dc.contributor.authorKulandhasamy, Maheswari
dc.contributor.authorNarayan, Ravi K.
dc.contributor.authorJha, Rakesh K.
dc.contributor.authorSingh, Himanshu N.
dc.contributor.authorPrasoon, Pranav
dc.contributor.authorPandey, Sada N.
dc.contributor.authorKant, Kamla
dc.date.accessioned2025-01-27T10:04:50Z
dc.date.available2025-01-27T10:04:50Z
dc.date.issued2022
dc.description.abstractYoung age, female sex, absence of comorbidities, and prior infection or vaccination are known epidemiological barriers for contracting the new infection and/or increased disease severity. Demographic trends from the recent coronavirus disease 2019 waves, which are believed to be driven by newer severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants, indicate that the aforementioned epidemiological barriers are being breached and a larger number of younger and healthy individuals are developing severe disease. The new SARS-CoV-2 variants have key mutations that can induce significant changes in the virus-host interactions. Recent studies report that, some of these mutations, singly or in a group, enhance key mechanisms, such as binding of the receptor-binding domain (RBD) of the viral spike protein with the angiotensin-converting enzyme 2 (ACE2) receptor in the host-cells, increase the glycosylation of spike protein at the antigenic sites, and enhance the proteolytic cleavage of the spike protein, thus leading to improved host-cell entry and the replication of the virus. The putative changes in the virus�host interactions imparted by the mutations in the RBD sequence can potentially be the reason behind the breach of the observed epidemiological barriers. Susceptibility for contracting SARS-CoV-2 infection and the disease outcomes are known to be influenced by host-cell expressions of ACE2 and other proteases. The new variants can act more efficiently, and even with the lesser availability of the viral entry-receptor and the associated proteases, can have more efficient host-cell entry and greater replication resulting in high viral loads and prolonged viral shedding, widespread tissue-injury, and severe inflammation leading to increased transmissibility and lethality. Furthermore, the accumulating evidence shows that multiple new variants have reduced neutralization by both, natural and vaccine-acquired antibodies, indicating that repeated and vaccine breakthrough infections may arise as serious health concerns in the ongoing pandemic. � 2021 Wiley Periodicals LLC.
dc.identifier.doihttps://doi.org/10.1002/jmv.27467
dc.identifier.issn1466615
dc.identifier.urihttps://dl.bhu.ac.in/ir/handle/123456789/13978
dc.publisherJohn Wiley and Sons Inc
dc.subjectCOVID-19
dc.subjectepidemiology
dc.subjectmutation
dc.subjectpandemic
dc.subjectSARS-CoV-2 variants
dc.subjectwaves
dc.titleEmerging SARS-CoV-2 variants can potentially break set epidemiological barriers in COVID-19
dc.typeReview
dspace.entity.typePublication
journal.titleJournal of Medical Virology
journalvolume.identifier.volume94

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2022