I know that West Nile in the US first appeared in New York state - far from the shores of Cuba - several years ago. I know that migratory birds fly all over the North American continent, and that some species cross the Atlantic in varying degrees. I know that Castro is not stupid enough to expose himself to something that he proposes to send against his enemies. I know that given all of these commonly known facts, that the conjecture in this article is simply that, conjecture.
When you put all of those things together, I would say that a 'tin-foil alert' would appropriate. That being the case, I have no desire to waste my time further with the article, refutation or not.
I want to like this doctor, I really do. He's pro-gun and anti-socialized medicine. But this article is simply too speculative and sensational.