49 people sickened, 1 death, 10 hospitalized in E. coli outbreak linked to McDonald's Quarter Pounders; CDC investigating slivered onions and beef patties.

An E. coli outbreak linked to McDonald's Quarter Pounders has sickened 49 people across 10 states, resulting in one death and 10 hospitalizations. The CDC is investigating the outbreak, focusing on slivered onions and beef patties as potential sources. McDonald's has removed these ingredients from affected locations. The CDC advises those with severe symptoms to seek medical attention and report recent food consumption.