In mid-July, the source was linked to shredded iceberg lettuce served at some Taco Bell locations|Yoana Petrova|CC BY-NC-SA 2.0

The Centers for Disease Control and Prevention (CDC) officially declared on Friday that the deadly cyclospora outbreak linked to iceberg lettuce is over.

The CDC confirmed that all products tied to the parasite have passed their best-by dates and are no longer in stores or restaurants.

The parasitic outbreak resulted in 12,883 cyclosporiasis cases, 570 hospitalizations across 21 states, and two deaths in Michigan since May 1. The spread was traced to iceberg lettuce grown by Taylor Farms in Mexico.

In mid-July, officials linked the source to shredded iceberg lettuce served at some Taco Bell locations. It prompted supplier Taylor Farms to issue a voluntary recall from grocery stores and restaurants. But FDA officials say they are still investigating how the lettuce was contaminated and whether the parasite has caused other outbreaks.