Tracking Covid-19 variants

According to the latest update from the World Health Organization (WHO) on Covid-19, WHO is monitoring several variants of SARS-CoV-2 (the virus that causes Covid-19), including: the JN.1 variant of concern; and the variants currently under monitoring: XFG, NB.1.8.1, KP.3.1.1, BA.3.2, and LP.8.1.

Globally, the most common variant is XFG, accounting for 75% (according to monitoring reports up to the end of December 2025) compared to 68% (in the last week of November 2025).

Additionally, NB.1.8.1 accounted for 9% of the total number of submitted sequences, down from 15%, and BA.3.2 remained stable at 3% of the total number of reported sequences.

The most common variant is XFG, accounting for 75% (according to monitoring reports up to the end of December 2025) compared to 68% (in the last week of November 2025).

Photo: AI

During this reporting period, all other variants showed a declining or stabilizing trend. The available evidence suggests that XFG, NB.1.8.1, and BA.3.2 do not pose any additional public health risk compared to other circulating SARS-CoV-2 variants.

Domestically, the Hanoi Center for Disease Control and Prevention announced that the city recorded its first two Covid-19 cases in the first weeks of 2026, an increase compared to the same period in 2025 (0 cases).

Source: https://thanhnien.vn/theo-doi-cac-bien-the-covid-19-185260127183310194.htm