AUTHOR=Silva Severino Jefferson Ribeiro da TITLE=The emergence of new SARS-CoV-2 omicron subvariants introduces uncertainty about the end of the COVID-19 pandemic JOURNAL=Frontiers in Medicine VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2022.1010489 DOI=10.3389/fmed.2022.1010489 ISSN=2296-858X