FRESNO, Calif. (KMJ/KFSN) — A new COVID-19 subvariant known as NB.1.8.1, or “Nimbus,” is spreading across the United States and gaining traction in California, prompting health officials to urge the public to stay up to date on vaccinations. The variant, first detected in China, now accounts for an estimated 37% of COVID-19 cases nationwide, according…… MORE
