Thoughts about Ruth (spoilers)

I have some thoughts about Ruth.

>!I think she is immortal now. She didn’t die from the pills and she didn’t die from the gunshot to the head. Yet, all the other Warren descendants died naturally (or else there wouldn’t be this genealogical record and the island would be overrun). But—now that Richard Warren is ribs and sausages, Ruth is the oldest living descendant. Did the curse/pledge pass to her, along with the immortality? Is that why she survived and now won’t be able to be killed?!<