Missouri Health Experts Monitoring New COVID-19 “Cicada” Variant

Jefferson City, Mo. (KFMO) - Missouri health experts are closely monitoring a newly identified COVID-19 variant known as “Cicada”, though only a limited number of cases have been detected so far.

Health officials say the variant has been identified through wastewater surveillance, with a small number of confirmed cases reported in Missouri as of early 2026.

The Cicada variant contains numerous genetic mutations, raising concerns it could partially evade existing immunity from prior infections or vaccinations. However, experts emphasize that it is not currently spreading rapidly or replacing other circulating COVID-19 strains.

Doctors across the state report that symptoms linked to the Cicada variant remain consistent with previous versions of the virus. Common symptoms include runny or stuffy nose, headache, fatigue, sneezing, sore throat, coughing, and in some cases, changes in taste or smell.

At this time, there is no indication the variant causes more severe illness than earlier strains.

One area of concern is vaccine effectiveness. Health experts say the current 2025–2026 COVID-19 vaccines may not perform as well against this specific lineage, potentially leading to an increase in breakthrough infections within communities.

Despite that concern, public health guidance remains unchanged. Officials recommend residents stay alert for symptoms, take basic precautions when needed, and follow updates as researchers continue to monitor the variant’s development.