The multi-state E.coli O15:H7 outbreak linked to romaine lettuce may be nearly over. According to the FDA, romaine lettuce from the Yuma growing region is no longer being harvested or distributed, which means “it is unlikely that any romaine lettuce from the Yuma growing region is still available in stores or restaurants due to its 21-day shelf life,” the agency states. The last harvest date was April 16.

Spanning across 32 states, thus far the case count of infections is at 172, with 75 hospitalizations and one death, according to the CDC.

The FDA investigation continues, and the agency is looking at all potential avenues of contamination throughout the chain—including growing, harvesting, packaging and distribution.