What's the Name of That Book??? discussion

A young woman who was raised in a remote tribe, by her missionary parents, returns to the US after her parents die in an outbreak that kills the whole village.
The books opens with her struggles as she navigates a boat downstream to try and find help. She is disoriented and very ill and ends up in an, I believe Brazilian, Hospital. By the time she can communicate the need to help the village, and a medical team is dispatched the whole village is dead and the medical team must wear hazmat suits just to investigate.
She goes to the US, because her last remaining family is there. In the US she stays with her cousin.
She learns the world has become completely technology dependent to the point smart phones have been replaced by chips in the brain. Due to this instant access in the brain to the internet, GPS, phone calls, etc. School has quit teaching facts and now teaches research and logic skills to help everyone navigate the instant access to all human knowledge.
She is offered a brain chip but declines as she believes it is against Gods plan to mess with the human brain like that.
Because she declines the brain chip, she is isolated and unable to really navigate the modern world. Her cousin is unsympathetic to her choice. However, the cousin’s husband is more understanding and helpful to the main character and helps her when he can.
The main story is the main character vs a large corporation that is trying to perfect the ability to transfer human consciousness into androids creating eternal life.
It turns out the main character’s grandfather helped start the company with a business partner. Now that the girl is back in the US, the corporation believes she has her grandfather’s knowledge or notebook or something and are trying to get her.
She believes her grandfather has dementia and is in a care home, but it turns out the corporation has brain micro-bots that can eat and affect the brain. Her grandfather doesn't really have dementia, his old business partner is keeping him ill, because the grandfather disagreed with the direction of the company. And the micro-bots cause the decease that killed the girl’s village by eating their brains.
The reason the grandfather didn't agree with the direction of the company is in early testing of transferring human consciousness into androids they discovered this disconnects humans from their souls diving them insane. As one of the last remaining in the US who believe in God he feels it is wrong to disconnect humans from their souls.

I found it! it took hours of googling but i found it!
The Last Christian by David Gregory.

Trackable link. The Last Christian by David Gregory.