In "World War Z" (the book), the scientific "questions" regarding how the zombies work are brought up but not answered. For instance, in the book, the zombies freeze solid in winter and when spring comes thaw and just start going again. The fact that ice crystals normally rupture cell membranes is brought up as a question of how this is possible; but no attempt is made to answer the question, because that's not the point of the book.
Wood frogs can survive freezing solid. Their liver produces glucose to flood all cells, prevent cell freezing, and protect against dehydration. Ice forms around cells and organs but not inside them, preventing lethal damage.
And if the book was about how such a "virus" might work, the author could have brought that up. But since the book is actually exploring how different cultures or people groups might react to the same event, going down that road would be a trap, and only invite more intense scrutiny from pedants. Explicitly "lampshading", as a sibling commenter put it, is the better way to achieve the author's goals.
In other words, the problem is "lampshaded": The author indicates to the audience that they are well-aware something doesn't make sense, in a way that encourages the reader to ignore it going forward.
