21.   Veterans who believe they are disabled with illnesses stemming from their military service now must prove that their symptoms began within two years of leaving the gulf region.

22.   He noted, for example, that blacks tended to arrive later at the hospital after symptoms began and more frequently had conditions that made treatment unsafe.

23.   Symptoms usually begin with diarrhea, with severe cases leading to neurological ailments.

24.   Symptoms usually begin with diarrhea, with some cases causes neurological problems.

25.   Symptoms often begin in early childhood.

26.   Symptoms begin with a low-grade fever, pain in the joints and itchy skin.

27.   Symptoms usually begin with diarrhea, with some cases causing neurological problems.

28.   This treatment may be especially hazardous if started more than a few hours after stroke symptoms begin.

29.   Yellow fever can incubate for three to seven days before symptoms begin to appear, said WHO.