A new COVID-19 variant, NB.1.8.1, originally identified in China, has been detected in the United States, including New York City. This variant has been associated with a significant increase in hospitalizations in parts of Asia.
NB.1.8.1 was first identified among international travelers arriving at U.S. airports in March and April 2025. Since then, cases have been reported in several states, including California, Virginia, Ohio, and Hawaii. The variant is noted for its high transmissibility, though current data suggest it does not cause more severe illness compared to previous strains.
In response to the emergence of NB.1.8.1, U.S. health authorities are adjusting vaccination guidelines. The Centers for Disease Control and Prevention (CDC) now recommend boosters primarily for seniors and high-risk groups, while ceasing recommendations for healthy children and pregnant women.
Public health experts emphasize the importance of continued preventive measures, including vaccination, mask-wearing in crowded or enclosed spaces, and practicing good hygiene. Authorities are closely monitoring the situation to detect any changes in the variant’s behavior or impact on public health.
As the situation evolves, staying informed through official health advisories and adhering to recommended precautions remain crucial in mitigating the spread of NB.1.8.1 and safeguarding public health.
