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The%20Delta%20Variant%20Could%20Create%20%u201CTwo%20Americas%u201D%20Of%20COVID%2C%20Experts%20Warn: It%u2019s%20unclear%20whether%20Delta%20will%20dominate%20as%20quickly%20and%20totally%20as%20it%20did%20in%20the%20UK%2C%20where%20it%20replaced%20an%20outbreak%20driven%20almost%20entirely%20by%20the%20Alpha%20variant.%20In%20the%20US%2C%20a%20larger%20number%20of%20competing%20variants%20are%20circulating%2C%20making%20it%20harder%20to%20predict%20what%20will%20happen%2C%20Bette%20Korber%2C%20a%20computational%20biologist%20at%20the%20Los%20Alamos%20National%20Laboratory%20in%20New%20Mexico%2C%20told%20BuzzFeed%20News.%20But%20she%20expects%20Delta%20to%20become%20the%20most%20common%20variant%20in%20the%20US%20within%20weeks.%20%u201CIt%u2019s%20really%20moving%20quickly%2C%u201D%20Korber%20said.