I have been reading this unusually-powerful story with my undivided attention since its serialization in Shonen Jump. I appreciated that the artist didn't hold back in his drawings or in the storyline. Perhaps this is because what the author has been waiting to do for years boiled over all at once in this work.
If the persuasive power of a novel comes from its style, the persuasive power of a manga comes from its drawings. It's all about what kind of pictures you can present before the reader's eyes. The persuasiveness of those drawings is the persuasiveness of the manga itself. The small details fade away.
In that regard, when I laid eyes on the drawing of the Baoh parasite, I was struck by its eeriness—in other words, its persuasive power. When the reader is presented with such a drawing, they simply have to trust the author. Masaki Yamada once wrote that "science fiction is description," and I believe that manga is a form of description as well.
A sequel to this story will undoubtedly have to be drawn before long.