Actually, scientists don't know exactly how lice jumped from gorillas to our human ancestors. They speculate that we may have eaten them or perhaps slept in their nests.
At another location, we found barrels of chemical material that was intended for use as biochemical weapons. Everyone talks about there being no weapons of mass destruction in Iraq, but they seem to be referring to completed nuclear bombs, not the many deadly chemical weapons or precursors that Saddam had stockpiled.