Romaine lettuce can be safe to eat if it is labeled with a harvest location and date that is outside of the California growing region, the Food and Drug Administration said Monday.

The FDA and Centers for Disease Control and Prevention had issued an alert last week, before Thanksgiving, that consumers should not eat any romaine lettuce because of an E. coli outbreak that sickened 43 Americans and 22 Canadians. But the FDA said on Monday that it was loosening the restriction — but with major caveats.

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