A severe respiratory illness, nicknamed the "razor blade sore throat," is circulating, driven by the highly transmissible Nimbus COVID-19 variant (NB.1.8.1). This Omicron subvariant binds tightly to throat receptors, causing excruciating pain—a common symptom reported to hospitals across the country. We explain the science: Why Nimbus causes this unique, brutal throat pain, and why parents must be vigilant about high fever and difficulty swallowing. We also cover rising cases of Mycoplasma and Pertussis. This 2025 respiratory season is complex. Know the facts, not the fear. Get the full symptom guide and prevention steps in our long-form video. #RazorBladeThroat #COVIDvariant #Nimbus #PediatricHealth #SoreThroat #Mycoplasma #Virus2025 #HealthSafety