As COVID variants have emerged, our understanding of COVID epidemiology has changed. Healthcare professionals need to know how variants emerge, keep up with the changes in knowledge of the epidemiology of COVID-19, and address updated information in the light of the Omicron variant. In a matter of weeks, the Omicron variant has surged worldwide, leading to millions of new cases. It is estimated that Omicron makes up about 95% of new cases of COVID-19 in the United States. Variants may have differences concerning transmissibility, vaccine efficacy, and herd immunity compared to the ancestral strain of SARS-CoV-2. Understanding the .. read lecture summary at http://speakersnetwork.com/forms/COVIDOMICRON.pdf