Burger King, Taco Bell, KFC are removing onions from their food in US. Here's why

Fast food chains in the US are removing onions from their menus after an E. coli outbreak. This contamination has been linked to pre-sliced onions used in some McDonald's burgers. The CDC confirmed the outbreak caused one death, urging stricter food safety protocols. McDonald's, KFC, Taco Bell, and Burger King have taken immediate actions.