New COVID variant NB.1.8.1 found at US airports amid global surge

By Admin

26 May, 2025

A new COVID-19 variant, named NB.1.8.1, has recently been detected in the United States, raising concerns among global and local health officials. Identified in foreign travelers arriving at major U.S. airports, this variant is believed to be spreading rapidly in parts of Asia, including China, Japan, and South Korea.

Detection Across U.S. Entry Points

The Centers for Disease Control and Prevention (CDC) confirmed that between April 22 and May 12, travelers carrying the NB.1.8.1 variant tested positive at airports in California, Washington state, Virginia, and areas surrounding New York City. These individuals had travel histories from multiple countries, including Japan, South Korea, France, and China.

Moreover, local transmission seems to be occurring within the U.S. as well. States like Ohio, Rhode Island, and Hawaii have also reported NB.1.8.1 cases that are not linked to international travel. The first known domestic cases in California and Washington were recorded as early as late March and early April.

A Closer Look at the Variant

NB.1.8.1 belongs to the JN.1 family of variants, a group that is already targeted by many existing COVID-19 vaccines. Early research suggests that while NB.1.8.1 may be more transmissible than previous strains, it does not appear to cause more severe illness.

Globally, countries like Hong Kong are witnessing a rapid surge in COVID-19 cases, leading to renewed public health measures such as mask mandates in crowded areas and public transport. Taiwan is also preparing for a potential outbreak by stocking up on vaccines and treatments, as more serious cases begin to emerge.

Vaccine Updates and Seasonal Trends

In the United States, health officials are currently in discussions about updating COVID-19 vaccines ahead of the fall and winter seasons. Some experts are recommending that the new vaccines target LP.8.1, a closely related variant that may offer cross-protection against NB.1.8.1.

Although COVID-19 case rates in the U.S. remain low for now, experts note that the virus is showing clear seasonal patterns, with minor spikes in the summer and more significant waves during the winter months. As always, they are staying vigilant for any unexpected changes in the virus's behavior.

WHO’s Take on NB.1.8.1

The World Health Organization (WHO) officially recognized NB.1.8.1 as a "variant under monitoring" on May 23, 2025, after its first documented case on January 22, 2025. The variant has evolved from an earlier version of the virus known as XDV.1.5.1, and WHO is closely watching its spread as global cases rise.

Conclusion

The emergence of NB.1.8.1 is a stark reminder that the COVID-19 virus continues to evolve. While current data does not suggest more severe illness, its increased transmissibility and international spread make it a critical variant for global health authorities to monitor. As always, staying informed, practicing good hygiene, and following public health guidance remain essential in protecting ourselves and our communities.