New COVID-19 Variant Cicada (BA.3.2) Detected in US

Highly virulent strain can infect fully vaccinated, cause severe symptoms

Mar. 26, 2026 at 11:50am

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The Centers for Disease Control and Prevention (CDC) has issued a warning about a new COVID-19 variant called Cicada (BA.3.2) that has been detected in over 23 countries, including the United States. The variant is highly virulent, with the ability to evade vaccine-induced immunity, and can trigger severe respiratory symptoms even in fully vaccinated individuals.

Why it matters

The emergence of the Cicada variant raises concerns about the potential for another wave of COVID-19 infections, despite the widespread vaccination efforts. The variant's ability to infect vaccinated individuals and cause severe illness could strain healthcare systems and lead to renewed lockdowns and restrictions.

The details

The Cicada variant is a genetically distinct lineage of SARS-CoV-2, separate from the JN.1 variant that has dominated infections in recent years. The variant has undergone about 75 mutations, particularly in the spike protein, making it less susceptible to the immune response generated by current vaccines. Symptoms of the Cicada variant include fever, chills, muscle aches, fatigue, and severe respiratory distress.

  • The Cicada variant was first detected in the United States in June 2025.
  • Between November 2025 and January 2026, the variant made up about 30% of cases in Denmark, Germany, and the Netherlands.
  • As of February 11, 2026, the Cicada variant has been detected in over 23 countries.

The players

Centers for Disease Control and Prevention (CDC)

The leading national public health institute in the United States, responsible for protecting public health and safety through the control and prevention of disease, injury, and disability.

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What they’re saying

“The number of mutations makes it less likely that current vaccines will be as highly effective, but we need more data to be sure.”

— Hopkins

What’s next

Researchers and health authorities are closely monitoring the spread of the Cicada variant and its potential impact on vaccine effectiveness. Further studies are needed to determine the full extent of the variant's transmissibility and severity.

The takeaway

The emergence of the Cicada variant serves as a reminder that the COVID-19 pandemic is far from over, and continued vigilance and adaptation of public health measures may be necessary to mitigate the impact of new, potentially more dangerous variants.