Since the start of the COVID-19 pandemic, numerous variants of SARS-CoV-2 have been
reported worldwide. The advent of variants of concern (VOCs) raises severe concerns amid …

Abstract Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) has undergone
multiple mutations since its emergence, and its latest variant, Omicron (B. 1.1. 529), is the …

The destructive effects of coronavirus disease 2019 (COVID-19) on the elderly and people
with cardiovascular disease have been proven. New findings shed light on the role of aging …

There is a wealth of data suggesting that the effectiveness of existing vaccines against the
Omicron variant, the most mutated SARS-CoV-2 variant to date, has been substantially …

Few live attenuated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
vaccines are in pre-clinical or clinical development. We seek to attenuate SARS-CoV-2 …

ABSTRACT The US Food and Drug Administration-authorized mRNA-and adenovirus-
based SARS-CoV-2 vaccines are intramuscularly injected in two doses and effective in …

The emergence of novel variants of SARS-CoV-2 and their abilities to evade the immune
response elicited through presently available vaccination makes it essential to recognize the …

Vaccine effectiveness (VE) and the urgency of booster vaccination against SARS-CoV-2
Omicron variant need evaluation. A systematic search was conducted from 1–6 April, 2022 …

Summary Introduction SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) is
the virus responsible for COVID-19. It is one of the most mutating virus in the world. These …

Background: During the last two years, the COVID-19 pandemic led to millions of disease-
related deaths worldwide. The efforts of the scientific community facing this global challenge …