McDonald's has paused Quarter Pounder sales in some states amid an E. coli outbreak, while foods ranging from smoked salmon to frozen waffles are under review.

Burger King, KFC, and other chains have pulled onions from their products after a potential source of McDonald's E. coli outbreak was identified.

Deadly food poisoning outbreaks tied to McDonald's and Boar's Head may have left Americans wondering whether there are new risks in the U.S. food supply.

McDonald's says consumers should feel safe eating at its restaurants. Food safety experts say it depends on your capacity for risk.

The E. coli outbreak linked with McDonald's Quarter Pounders has sickened at least 50 customers and hospitalized at least 10, the CDC says.

Victims who have been sickened in connection to the deadly E. coli outbreak linked to McDonald's famed Quarter Pounders are already lawyering up. Top food safety attorney Ron Simon of the Houston, Texas-based law firm Ron Simon & Associates told Business Insider Wednesday that his phones have been "ringing off the hook" after federal health officials reported the outbreak Tuesday.

With 49 people sickened by E. coli infections after eating at certain McDonald's locations, some may be wondering about the safety of eating there.

The CDC is investigating Quarter Pounders as the possible source of the food-safety crisis, with one death and dozens of illnesses across 10 states.

Several restaurants, including Burger King, Taco Bell, Pizza Hut and KFC, are adding new safeguards to their food due to the E. coli outbreak at McDonald's.