COVID-19 variant BA.3.2, nicknamed “cicada,” is spreading across the United States and has now been detected in at least 25 states through wastewater, traveler testing and clinical samples, according to CDC reporting cited by multiple outlets.
Public health experts say the variant is highly mutated and may have some immune-escape advantage, but there is no evidence so far that it causes more severe illness than prior strains.
What BA.3.2 is
BA.3.2 is a descendant of the Omicron family and was first identified in South Africa in November 2024. Researchers say it carries roughly 70 to 75 mutations in its spike protein, far more than many recent lineages, which is why it has drawn attention from CDC scientists and outside experts.
That spike-protein change matters because it affects how the virus enters human cells and how well prior infection or vaccination may recognize it. In short, the variant appears unusual enough to merit close monitoring even if it has not yet produced signs of a more dangerous disease course.
How it spread
The first U.S. detection was found in a traveler entering the country in June 2025, and CDC surveillance has since identified the variant in wastewater and sample data across dozens of sites. By the most recent reports, BA.3.2 had been found in at least 25 states and in monitoring sites across multiple regions of the country.
The spread is also international. CDC-linked reports say the strain has been detected in more than 20 countries, including Denmark, Germany, and the Netherlands, where it gained share in late 2025 and early 2026.
What the risk is
Public health experts quoted in recent coverage say the main concern is transmissibility and immune escape, not a proven jump in severity. That means the variant could cause more infections if it spreads widely, especially among people whose protection has waned.
At the same time, experts stress that vaccines and prior immunity still matter, especially against severe disease. The CDC has not reported evidence that BA.3.2 is more lethal than previously circulating variants.
Why surveillance matters
Wastewater monitoring has become one of the most important tools for spotting new COVID variants early. Because it can pick up viral signals before hospitals see a surge, it helps officials track spread even when many infections go untested.
CDC researchers say BA.3.2 was flagged through a multimodal surveillance system that includes traveler screening, clinical sequencing, and wastewater sampling. That layered approach matters because fewer people are now regularly getting tested compared with the height of the pandemic.
What to watch next
The key question is whether BA.3.2 keeps gaining share or remains a minority strain. The latest available reports suggest it is still not dominant in the United States, even though it is clearly spreading.
Doctors also want to know whether the variant changes the timing or scale of local surges, particularly in places where vaccination rates are lower or where vulnerable populations are concentrated. For now, the best advice remains familiar: stay up to date on vaccines, test if you are sick, and take extra precautions around older adults and immunocompromised people.