The one in four sick Gulf War vets—or about 250,000 people who served in 1991 in Iraq, Kuwait and Saudi Arabia—already know that.
There have been many reasons for the confusion: Some veterans were sickened after service in the Persian Gulf, while others were not. Veterans serving different countries suffered different symptoms. Even veterans serving in the same units had different symptoms. And the symptoms themselves seemed to have no logic.
There were also some red herrings that, while they may have their own issues, research has shown do not seem to be tied to Gulf War illness, including depleted uranium and vaccinations.