New cell sized microrobots could form special DNA sections, and then insert these into chromosomes of cells they briefly attach to. Once they fail to find more cells lacking such new DNA sections, they would be pulled back outside with the injection needle, (maybe for later reuse elsewhere). Other microrobots could be injected to test some organ cells for some unwanted DNA sections to delete.
These all opened interesting ways to start genetically improving ourselves & our descendants. Of course some will resist this, especially some strongly devoted religious conservatives, some likely even violently opposing anything like this, as disrespectful corrupt nasty violations contrary to their proudly proclaimed status as if being God's (Allah's, Jahveh's) Superior Intelligent Design of us to be Earth's most Special top life form, second only to His also specially wanted praise singing Created Angels.
There are reports, often each week from around the world, of deadly attacks loosely aimed against others whom some dedicated religious conservatives violently oppose. Or sometimes they will specifically kill one or a few folks they learn are involved in activities they very hatefully oppose, no matter how useful to others. (Lucky for a futurist like me that such hateful religious conservatives don't know who I really am.)
Never mind that killing fellow humans was supposed to be a forbidden major evil sin. Never mind that killing us, such as from natural disasters, bad health, and aging, was supposed to be reserved for God (Allah, Jahveh) to keep arrogantly doing all He pleased. Conservative haters disrespectfully don't seem to care in the slightest. News reports show they even quite happily kill many innocent strangers and even children with their exploding bombs, maybe just to hatefully try giving some pretended political message.
Despite this bad threatening conservative religious reality, some good DNA R&D (research & development) experts would fondly love to kindly develop multiple ways to improve and extend healthier lives of fellow humans. (Already by 2010 some researchers were trying to develop ways to reduce cell aging for humans. They predicted future lives spanning centuries.
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