SciFi. Rulers clone two boys, correct genetic defects of 1 & keep, other put up for adoption. Current humans have genetic mutation due to vaccine. Two brothers do not have mutation, ancient tech only recognizes them as human. Read 2020-2021. Spoilers.

[Sheryl]

SF/Read 20-21/Rulers clone two boys from a long deceased great military leader/One brother they correct genetic defects and keep, the other they leave natural and put up for adoption/All current humans have had a genetic mutation due to a vaccine given in the past to stop a space borne virus/the two brothers do not have the mutation/ ancient tech only recognizes the two brothers as human/ the brother raised by the rulers becomes an outlaw/ the other has allergies and is good with computers and robots and treats robots as his friends/ gets conscripted to help with the mysterious tech

[Sheryl]

I believe the book is part of a series. I would like to find the name of the book so I can read the "rest of the story".
More Info (spoilers):
The two brothers did not know of each other until the excitement and intrigue begins. They were both cloned from a long, dead, heroic General and thus don't have the genetic mutation the rest of humanity has from a vaccine given to stop plague a few generations back.
The genetic variation that everyone else has causes them to be considered "not human" by the ancient tech that the Rulers (and everyone else) are trying to possess and study.
The "favored" brother becomes an outlaw after his Ruler Father has the love of his life killed.
The other brother is adopted by a Jewish man and woman as a baby. He is very good with programming an robotics. He is nerdy, kind and caring of both humans and bots. For his government job he creates these jet black robots that the rulers turn into weapons which was not his intention.

[Kris]

Sheryl, is this book for adults or teens? How old are the two brothers?

Location?