The common cold died out 500 years ago and subsequently humanity lost all resistance to its ravages.
According to the thread dealing with the difference between subsequently and consequently, the line uttered by the professor is ungrammatical, for humanity would lose all the resistance to a virus only if the virus were to die out completely. Therefore, the action follows as a result.
Am I right on this one? Being very strict here, can we claim that the Futurama creators made a mistake, or is this an exception to the rule? Could someone clarify/explain?