There has been an unusual number of cases of hepatitus A traced to green onions. It Atlanta several people who had reported it had it traced to eating salsa at Chi-Chi's restaurant. The identical strain was reported in North Carolina and again traced to green onion. One Georgia State farmers market vendor was quoted on local news as saying his sales of green onions was now zero. From the Washington Post: "Outbreak Tied to Scallions BEAVER, Pa. -- A hepatitis A outbreak that has killed three people and sickened nearly 600 others who ate at a Chi-Chi's Mexican restaurant probably was caused by green onions from Mexico, health officials said Friday. How the scallions became tainted remains unclear. All the hepatitis A cases at the restaurant 25 miles northwest of Pittsburgh have been linked to green onions, and most of the victims likely contracted it through mild salsa and cheese dip, the Centers for Disease Control and Prevention said. The two dishes both used raw or lightly cooked onions."