A new COVID-19 variant called XFG, nicknamed "Stratus," is spreading quickly in the United States and is now the third most common strain this summer.
Notably, XFG is a mix of two other variants - F.7 and LP.8.1.2, the latter being the second most common in the U.S.
First found in Southeast Asia in January, XFG made up almost none of the cases in the U.S. until May. By late June, it had risen to 14 percent of cases, according to the Centers for Disease Control and Prevention (CDC).
Globally, the World Health Organization (WHO) reported that XFG cases jumped from 7.4 percent in early May to 22.7 percent by the end of the month.
The WHO has added XFG to its watchlist. However, it noted that the overall global risk is low at present. Current COVID-19 vaccines are expected to still protect against serious illness from this variant.
This increase comes as the U.S. Department of Health and Human Services announced plans to end 22 federal contracts for mRNA-based vaccines, raising concerns about the future of the technology that helped end the pandemic.
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Business News
June 12, 2026 17:14 ET Major central bank action was the focus this week in economic news. The European Central Bank became the first major central bank to move in response to the rising inflationary pressures in the backdrop of the conflict in the Middle East. In North America, the U.S. inflation and trade data as well as Canada’s central bank decision gained attention. The Chinese trade data was the main news in Asia.