No, kid, it is not absurd at all.
Sorry Jake, I really do think the idea is absurd. Number one, just from a standpoint of practicality, anyone who was going to pursue such a Doctor Doom comic book plot wouldn't bother trying to smuggle blood -- they'd intentionally infect a carrier and immediately send them over. Smuggling can be much more easily detected.
Then again though, the idea that a political group waging a war a gazillion miles away even cares about sending infections across the oceans, let alone that any of them would volunteer for a suicide mission where suicide is guaranteed but the mission is not -- because they still have to find a way to infect somebody -- reeeeeally stretches the limits of credulity.
I could see this idea being used as a Fox Noise fearmonger chyron. It's too silly to be applied anywhere else.