The Centers for Disease Control and Prevention has traced an ongoing E. coli outbreak to romaine lettuce grown in the Central Coastal region of California.
Lettuce from other parts of the U.S. and Mexico is safe to eat, the CDC says. However, if you're not sure where your romaine lettuce came from, err on the side of caution and throw it out, health experts say.
A total of 43 people in 12 states have been infected in this outbreak. No deaths have been reported.
The CDC first announced the outbreak a week ago, warning consumers to stay away from all romaine lettuce until more was known about the outbreak.
Now the agency is narrowing that warning.