N.B.1.8.1 is growing fast in South East Asia and is probably the dominant variant, but has yet to take off elsewhere.

Estimated percent of the N.B.1.8.1 Covid variant detected in Covid samples for selected countries. Nov 25, 2024 to May 12, 2025

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The methods used to measure the percent of variants differs between countries and consequently are not directly comparable. In addition, there is high degree of uncertainty in this data due to the low number of samples sequenced.

Chart: Bob Hawkins Source: COVSpectrum (GISAID Data) Get the data Created with Datawrapper