Compared to prior waves of COVID-19 in the United States, the Omicron wave has had a lower proportion of cases resulting in hospitalization or death.Īmerica has weathered the current Omicron wave with minimal disruption – schools and businesses largely remained open. However, because of both lower severity of the Omicron variant and a stronger level of population immunity from vaccinations, Omicron has caused relatively fewer cases of severe COVID-19. Omicron represented another step in the virus’s evolution, and has been one of the most contagious viruses in history, causing record numbers of infections around the world over the past three months. The Delta variant, which was more than twice as contagious as the original coronavirus strain, then swept across the country starting in Summer 2021, beginning in the South and spreading to the Midwest and Rocky Mountain regions. vaccination program was administering a record number of vaccines every day. America experienced a wave of COVID-19 cases driven by the Alpha variant in early Spring 2021 – a time when the U.S. The United States has experienced five waves of the pandemic since 2020, including three in the past year that were driven by new variants.
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