CDC wastewater also shows the XFG variant — nicknamed stratus — is most common in the U.S. Stratus can cause a “razor blade” ...

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The COVID-19 variant that may be driving a recent rise in cases in some parts of the world earned a new nickname: "razor blade throat" COVID.

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Moderna Receives European Commission Approval for Updated COVID-19 Vaccine Targeting SARS-CoV-2 Variant LP.8.1 Provided by ACCESS Newswire Jul 30, 2025, 1:05:00 PM ...

These include “Nimbus,” which causes a painful “razor blade throat.” Nimbus is now the dominant variant in the U.S., accounting for 43% of cases as of June 21st, according to CDC data.

Moderna's COVID-19 vaccines have been generally well-tolerated. The most common solicited local adverse event for Moderna's COVID-19 vaccines is injection site pain.

Online, this is known as “razor blade throat,” Lokant said. It certainly is true that COVID can cause a sore throat, and a pretty bad one at that, but you shouldn’t let this symptom panic you.