A new COVID-19 variant called BA.3.2 has quietly spread across 25 U.S. States. It’s a heavily mutated version of Omicron that experts warn could partly dodge existing immunity from vaccines or prior infections.

Where Did BA.3.2 Come From?

The BA.3.2 variant first appeared in South Africa in November 2024. Since then, it has traveled across the globe and been spotted in at least 23 countries, including the U.S. In fact, the first confirmed American case came in June 2025, detected in a traveler arriving from the Netherlands at San Francisco International Airport.

Surveillance efforts have revealed the variant in nasal swabs from travelers, clinical samples from patients, and even airplane wastewater. By February 2026, BA.3.2 was found in 132 wastewater samples across 25 states, signaling that it’s more widespread than clinical testing alone shows.

What Makes BA.3.2 Different?

BA.3.2 carries around 70 to 75 mutations in its spike protein—the part of the virus that vaccines and past infections train the immune system to recognize. That many changes are unusual and could help the virus slip past immune defenses more easily.

“BA.3.2 has immune escape characteristics,” the CDC noted, meaning it might partially avoid protection from vaccines or previous COVID infections. But so far, there’s no proof that it causes more severe illness than other variants.

Still, the mutations make scientists watchful. Changes in the spike protein affect the receptor-binding sites and other parts that let the virus attach to human cells. These tweaks could make BA.3.2 better at spreading, even if it doesn’t make people sicker.

What Symptoms Are People Experiencing?

The symptoms linked to BA.3.2 are mostly familiar. Folks report cough, fever, fatigue, headache, body aches, sore throat, sneezing, and upper respiratory infections. Some have noticed a loss of smell or taste, though this symptom isn’t as common as it was earlier in the pandemic.

Other symptoms include nasal congestion, runny nose, night sweats, skin rashes, and in a few cases, fainting. Like other COVID variants, some people don’t show any symptoms at all.

Severity varies widely depending on age, health conditions, and whether someone is up to date with vaccines or has had COVID before.

How Are Health Officials Responding?

The CDC is keeping a close eye on BA.3.2 through genomic surveillance, which includes testing travelers, monitoring wastewater, and analyzing clinical samples. The approach helps spot changes early and track how the variant spreads.

While BA.3.2 hasn’t overtaken other COVID strains yet, the fact that it’s evolving into sublineages—named BA.3.2.1 and BA.3.2.2—shows the virus hasn’t stopped changing.

Health experts say keeping up with COVID vaccines is still the best way to protect yourself. Even if you get infected, vaccines should still help prevent serious illness, hospital stays, and death.

They also stress the importance of ongoing surveillance to monitor any shifts in the virus that might affect public health strategies or vaccine design.

The rise of BA.3.2 shows that the coronavirus keeps changing. It might not be more dangerous yet, but since it can partly dodge immunity, scientists are staying alert—and we should too.