Summary:
- An E. coli outbreak linked to McDonald's Quarter Pounder burgers has sickened at least 57 people across 16 states in the U.S.
- The Centers for Disease Control and Prevention (CDC) is investigating the outbreak and has advised consumers to avoid eating Quarter Pounder burgers from McDonald's until further notice.
- McDonald's has temporarily suspended the sale of Quarter Pounder burgers at affected locations and is cooperating with the CDC and other health authorities to determine the source of the contamination and prevent further spread of the outbreak.