A new SARS-CoV-2 variant, BA.3.2, is spreading across the United States, prompting concern from the Centers for Disease Control and Prevention.
First identified in a U.S. traveler from the Netherlands in June 2025, BA.3.2 has since appeared in clinical samples, traveler screenings, and wastewater from 25 states. Globally, at least 23 countries have reported cases as of February 11.
The variant carries 70 to 75 mutations in its spike protein, which the CDC says may enable partial evasion of immunity from prior infection or vaccination. That could increase transmission risk-though not necessarily disease severity.
BA.3.2 is genetically distinct from recent dominant lineages like JN.1, LP.8.1, and XFG. In Europe, it accounted for roughly 30% of sequenced cases in Denmark, Germany, and the Netherlands between November 2025 and January 2026.
CDC researchers stress the need for continued genomic surveillance, noting two emerging sublineages-BA.3.2.1 and BA.3.2.2-highlight ongoing viral evolution that could affect public health responses.