[Suzerain of Sheol]

The few symptoms of having been bitten are: The facial muscles get tight in one to two hours, the patient may be unable to talk or see, and, if left untreated, the patient may die from respiratory paralysis within four to five hours. A clinical toxicology study gives an untreated mortality rate of 70-80%.

That actually sounds less dangerous than the rest. Certainly not enough to kill him before Thomas gets over, I would think.