Mexico & Yum! Brands — Taco Bell

Mexico: Mexico is the source of the contaminated lettuce. The outbreak has damaged the reputation of Mexican produce and led to increased scrutiny of agricultural practices in central Mexico.

Yum! Brands — Taco Bell: Yum! Brands — Taco Bell, a subsidiary of Yum! Brands, was the main restaurant chain linked to the contaminated lettuce. It removed the affected lettuce from its supply chain, but the outbreak has led to a significant drop in customer traffic and negative publicity.

Mexico: Mentioned in context of past outbreak linked to basil.

Yum! Brands — Taco Bell: Voluntarily removed limited ingredients from select restaurants as a precaution; under investigation for possible link.