SARS-CoV-2 delta variant: A literature review
Amine BAZIZ (a*), Rachid CHAIB (a), Mohammed BOUGOFA (a), Mebarek DJEBABRA (b), Salah ABERKANE (c), Imad MENNAI (d)

a) Laboratory of Transportation Engineering, BP 325, Constantine, 25017, Algeria
* bazizamin[at]yahoo.com
b) Laboratory of Research in Industrial Prevention, Fesdis, Batna, 05078, Algeria
c) Departement of psychology, BP 1252 Road of Batna, Khenchela, 40004, Algeria
d) Research Unit of Natural Resources Valorization, Bioactive Molecules, Physiochemical and Biological Analysis, BP 325, Constantine, 25017, Algeria

Abstract

The ongoing pandemic of COVID-19 is causing more health, economic and social issues worldwide. As of July 5, 2021, the world registered more than 184 million cases across 222 countries- more than 4 million have died from the deadly infection. The SARS-CoV-2 continues spreading globally- new variants emerge randomly due to errors in the virus gRNAs replication process. The present paper treats the new delta variant of concern, also known as B.1.617.2 lineage. The study highlights transmissibility, vaccine effectiveness, pathogenicity, and the likelihood of hospital admission related to delta variant infection based on a literature review of 10 indexed databases. The findings indicate high transmissibility of the B.1.617.2 lineage, approving it to be the dominant strain worldwide. Also, reduced vaccines effectiveness is confirmed. However, approved vaccines for emergency use remain valuable against COVID-19 s delta variant. Finally, the risk of hospitalization seems to be twice in the case of delta variant infection. A combined approach of vaccination and non-pharmaceutical interventions is the leading way to contain the ongoing pandemic of COVID-19.

Keywords: SARS-CoV-2- Delta variant- Transmission- Hospitalisation- vaccine effectiveness

Topic: Environment, health, and safety system