When Tom Geisbert was studying the virus from the monkey house sample he reacted "his stomach screwed up into a knot and turned over , and he felt an unpleasant sensation .

Tom reacted strongly to his discovery because he and Pete had been handling the virus.... they'd inhaled it.

Pete and I smelled this stuff. Pete and I have been handling this stuff, and this is a Biosafety Level 4 agent. Marburg … oh, man … A foul feeling washed over him, a sudden awareness of male reproductive glands hanging on the exterior of the body between the legs … testicles the size of pears, black and putrid, the skin peeling off them.