"Nimbus, a new COVID-19 variant, has become the dominant strain in the U.S., accounting for 43% of cases as of late June 2025."
"The 'razor blade throat' symptom is a reported side effect of Nimbus, which is a subvariant of Omicron, first identified in January 2025."
"CDC data shows a rapid increase of Nimbus variant cases in the U.S., highlighted by its rise from 5% to 43% in just over a month."
"Public health officials face challenges in tracking Nimbus due to reduced sequencing reported to the CDC, complicating efforts to monitor variance spread."
The Nimbus variant, also known as NB.1.8.1, is a subvariant of Omicron that has rapidly spread globally since its detection in January 2025. It has significantly gained dominance in the United States, jumping from 5% of cases in early May to 43% by late June. Reports indicate that Nimbus sometimes causes an unusual symptom called 'razor blade throat.' However, tracking the exact spread is complicated by a decrease in the sequencing of variants reported to the CDC, leaving public health officials with uncertainties about its prevalence across different states.
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