Differences in mutations of SARS-CoV-2 Omicron (between BA.1 and BA.2) By Mx22/2/2022/2/20Nature Differences in mutations of SARS-CoV-2 Omicron (between BA.1 and BA.2) were cited from the following paper. https://pubmed.ncbi.nlm.nih.gov/35169817/