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Death still reigns on earth and will only be finally removed at the end of the millennium when Christ steps down from his position of power and hands the kingdom over to his Father who will then be "all in all".
See 1 Corinthians 15:51-55; in verse 26, Paul says, "The last enemy that shall be destroyed is death" so clearly, death is not done away until after he returns and his work of restoration during the millennium is complete.
Here's a link to information on this topic which will be useful to you: After Death, What?
I hope you have found this helpful.