Emergence of EU.1.1 COVID Variant Tracked by CDC

The EU.1.1 variant, a descendant of the XBB.1.5 variant, currently accounts for 1.7% of U.S. COVID cases. Experts suggest caution but do not consider it a cause for alarm as it does not appear to have a significant advantage in terms of transmissibility or severity compared to other circulating lineages. The variant has been detected primarily in Utah, but signs indicate it may be slowing down. Immunocompromised individuals are advised to take XBB.1.5 boosters when available. The FDA expects these boosters to be available in the fall.