AUTHOR=Angius Fabrizio , Pala Giuseppe , Manzin Aldo 

TITLE=SARS-CoV-2 and Its Variants: The Pandemic of Unvaccinated

JOURNAL=Frontiers in Microbiology

VOLUME=12

YEAR=2021

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2021.749634

DOI=10.3389/fmicb.2021.749634

ISSN=1664-302X