A new Covid variant that has prompted calls for face masks to return is 'probably' already in the US, experts have told DailyMail.com. The mutant strain — known as BA.6 — has only officially been detected in Israel and Denmark, but several scientists said it will start showing up in tests in America 'very soon'.Routine swabbing is no longer being done in the US and only a fraction of positive tests are sent away for analysis to see the Covid strain behind the case, meaning it can take weeks before new strains are detected.
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