The CDC Covid Data Tracker estimates the “omicron” subvariant EG.5 is now the most prevalent in the US, overtaking XBB1.16. As of August 5, 2023, Omicron (including its sub-variants) still comprise 100% of new cases. Vaccines continue to be highly effective at preventing hospitalization and death, including against these variants. CDC’s state, county and community profiles regarding Covid trends can also be accessed from this website, through the “Data Tracker” section.