Fifth Vial

And the fifth angel poured out his vial upon the seat of the beast; and his kingdom was full of darkness; and they gnawed their tongues for pain, 11 And blasphemed the God of heaven because of their pains and their sores, and repented not of their deeds.

Rev 16:10-11 (KJV)

This one is finally an easy one to answer. This may be radiation poisoning, or something like MERSA. If you're saved... nothing to be worried about.