Table 3.

Regional prevalence (%) of SARS-CoV-2 variants XEC and KP.3.1.1 across WHO regions during epidemiological weeks 34 and 37 of 2024. The table presents aggregated prevalence data by WHO region for variants under monitoring (VuM) XEC and KP.3.1.1, as reported in the GISAID and WHO variant surveillance summaries. The prevalence percentages reflect the proportion of submitted sequences in each region during the specified weeks. Data from Southeast Asia, Africa, and the Eastern Mediterranean were not reported, or only isolated sequences were included. Data were accessed in compliance with GISAID’s Terms of Use (https://www.gisaid.org/, accessed on 30 June 2025).

VUMs	Region	Epiweek 34 *	Epiweek 37 *
XEC	Europe	5.3	12.0
	The Western Pacific	0.2	2.0
	The Americas	0.9%	2.8%
	Eastern Mediterranean region, Africa, Southeast Asia	Not reported	Not reported
KP.3.1.1	Europe	48.2	50.4
	The Western Pacific	13.5	24.2
	The Americas	34.1	49.2
	Southeast Asia	A single reported sequence	A single reported sequence