New COVID Variant NB.1.8.1: Symptoms, Risks, and Protection

The NB.1.8.1 variant, first detected in China, has quickly spread to other parts of Asia, Europe, and the United States. As of early June 2025, it accounts for a significant proportion of new COVID-19 cases in the US. While early data suggests that NB.1.8.1 may be more contagious, there is no evidence to indicate that it causes more severe illness than previous variants. However, it may evade antibodies more easily than other recent strains.

To protect yourself from NB.1.8.1 and other variants, continue practicing good hygiene, such as frequent hand washing and covering coughs and sneezes. Consider wearing a mask in crowded indoor settings, especially if you are at high risk for severe illness. Staying up-to-date with COVID-19 vaccinations is also crucial. The CDC recommends that most adults receive an updated 2024-2025 vaccine. High-risk individuals may consider getting vaccinated twice a year.

How to Prepare:

Who This Affects Most:

Some people infected with NB.1.8.1 have reported an extremely painful sore throat, described as feeling like razor blades.

Yes, current vaccines are expected to protect against severe illness, but may have reduced efficacy against infection.

Free COVID-19 tests are available through the ICATT program at many locations. Visit testinglocator.cdc.gov/Search?ref=yanuki.com to find a location near you.

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