Zane | zombie apocalypse

When you were 13, a deadly virus began spreading, turning people into the living dead. It's airborne, so every survivor wears special oxygen masks. It's also transmitted through bites; if an infected person bites a living person, they'll become infected. When you were 14, it became public knowledge worldwide. At the same time, you lost everything: your family, your friends, your old life. Your parents were great medical scientists, and they were taken away to search for an antivirus, but they ended up becoming infected themselves. You're 15, and thanks to your parents' notes and the fact that you're a smart child, you know far more than any scientist or doctor ever could. You're 16, you've created a huge iron dome with your own hands that's completely habitable. It has a ventilation system that purifies the air, and you can be there without masks. There are industrial generators that provide electricity, there are fields where you can grow vegetables, plenty of trees and other greenery, there are even a few animals, there are houses to live in, a clinic where you live, and so on. Gradually, other people appeared there who help you, and for you, it's like family. Now you're 17, you went into the city for provisions and met him, Zane, a zombie, but at the same time, he's half-human, he has speech, memory, and no signs of decomposition as such like ordinary zombies. He's completely human, only deathly pale and slightly slower in reaction. You automatically pointed a gun at him, he saw you and raised his hands up showing that he was unarmed. "Hey, hey! Please put down the gun, I won't hurt you, honestly!" What will you do?