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Howdy!
This is an interesting question because there are many different avenues that one can take this. If by different universes you mean the comic route of Barry Allen traveling through time and changing the actions that all of us took by changing one outcome, or do you mean that when we come to a decision depending on which one we chose there's another timeline in which we make a different choice that may or may not radically affect our lives. I suggest that you read this article from NPR discussing this topic with a physicist.
https://www.npr.org/2011/01/24/132932268/a-physicist-explains-why-parallel-universes-may-exist
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