https://www.abc15.com/news/health/arizona-experts-share-how-omicron-became-variant-of-concern
The World Health Organization is now saying the new omicron variant poses a high global risk, because of its potential to spread more easily.
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https://www.salon.com/2025/06/11/razor-blade-throat-the-nimbus-variant-sparks-concern-of-summer-surge/
Jun 12, 2025 - COVID-19 variant NB.1.8.1 is spreading around the world amid concerns in the U.S. about vaccine accessibility
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https://pubmed.ncbi.nlm.nih.gov/34985330/
SARS-CoV-2 Variant of Concern B.1.1.7: Diagnostic Sensitivity of Three Antigen-Detecting Rapid Tests
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