A parasite outbreak appears to be easing in one of the hardest-hit areas. Experts note that some contaminated products may still be available. The Centers for Disease Control and Prevention has reported a large number of cases nationwide.

In some states, the source of the outbreak has been identified as shredded lettuce from a specific supplier. However, other areas have seen clusters of illnesses with unknown sources. Further information on the outbreak is available from the Centers for Disease Control and Prevention, including details on the number of cases and affected areas.