The variant appears to have a small growth advantage over Delta but does not resist vaccines more easily, according to recent findings.
The variant is found almost entirely in the U.K., where it has accounted for around 15 percent of samples sequenced per day recently.
Including the U.K. and the U.S., AY.4.2 has been detected in a total of 39 countries worldwide, with Romania and Poland recording some notable prevalence, Outbreak.Info shows. It is not unusual for a virus to mutate. They do so all the time as they spread from person to person. Where variants first emerge also makes a difference. Factors include local vaccine rates, population density, and existing immune response rates.
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