Background Over the last two decades, humanity has observed the extraordinary anomaly
caused by novel, weird coronavirus strains, such as severe acute respiratory syndrome …

Three and a half years after the pandemic outbreak, now that WHO has formally declared
that the emergency is over, COVID-19 is still a significant global issue. Here, we focus on …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative virus of the
coronavirus disease 2019 (COVID-19), has been identified in China in late December 2019 …

Background Many new variants of the severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2) have been termed variants of concern/interest (VOC/I) because of the greater …

Background The emergence of the novel coronavirus in Wuhan, Hubei Province, China, in
December 2019 marked the synchronization of the world to a peculiar clock that is counting …

Since the worldwide emergence of the COVID-19 outbreak, there have been international
concerns about the possible viral evolution into variants with underlying mutations that may …

Abstract Background The SARS-CoV-2 coronavirus epidemic is hastening the discovery of
the most efficient vaccines. The development of cost-effective vaccines seems to be the only …

The third pandemic of coronavirus infection, called COVID-19 disease, began recently in
China. The newly discovered coronavirus, entitled SARS-CoV-2, is the seventh member of …

The worldwide burden of coronavirus disease 2019 (COVID-19) is still unremittingly
prosecuting, with nearly 300 million infections and over 5.3 million deaths recorded so far …