I would change the position of the comma in this sentence.
"Those infected with RPC-484-1 can be manipulated by RPC-484 to speak and communicate with other humans though, they are only capable of forming simple sentences."
So that it may instead read:
Those infected with RPC-484-1 can be manipulated by RPC-484 to speak and communicate with other humans, though they are only capable of forming simple sentences.
Which is what I believe the original intent of the sentence was to portray. Other than that, pretty simple article, leaves some mystery to be discovered, pretty good. 4/5.