The U.S. Centers for Disease Control and Prevention () has now included the 'stealth' Covid variant, or BA.2 on its official public data tracking, and the variant does not seem to be making the expected impact so far.Data from the CDC updated Tuesday shows that BA.2 made up four percent of sequenced cases in the U.S. during the week of February 5.In the previous two weeks, the variant made up 0.5 percent and 1.2 percent of cases in previous weeks.
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