A recent E.coli outbreak associated with certain fast-food restaurants has brought up significant health-related concerns all across the industry. The E.coli outbreak is originally linked to pre-sliced onion used in McDonald’s Quarter Pounder burgers, and it has caused major food chain restaurants- - including KFC, Taco Bell, and Burger King- - to take precautionary measures by removing fresh onions from their menus in the US.source https://timesofindia.indiatimes.com/life-style/health-fitness/health-news/why-fast-food-chains-like-burger-king-taco-bell-kfc-are-removing-onions-from-their-food/articleshow/114662937.cms