New variant spreads across world, here’s what we know so far

An illustrative image of a person holding a medical syringe and a vaccine vial in front of the Pfizer logo displayed on a screen.

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The World Health Organization is monitoring a new strain of Covid-19 called EG.5, or “Eris,” that accounts for a growing share of cases in countries including China and the United States.

The WHO has designated it a “variant of interest,” meaning it will be monitored for mutations that could make it more severe.

Based on current evidence, the organization says it presents a low public health risk at a global level, in line with other variants currently in circulation. In May, the WHO more broadly said Covid-19 was now “an established and ongoing health issue which no longer constitutes a public health emergency of international concern.”

Symptoms and spread

Based on sequencing information submitted to the Global Initiative on Sharing All Influenza Data (GISAID) as of Aug. 7, the largest portion of EG.5 cases were identified in China, followed by the U.S., South Korea, Japan and Canada.

It was also identified in Australia, Singapore, the U.K., France, Portugal and Spain.

According to the Centers for Disease Control and Prevention, EG.5 is now the dominant strain in the U.S., accounting for 17.3% of cases as of the week ended Aug. 5.

Vaccine reformulations

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