According to the USA media reports, two USA consumers filed a class-action lawsuit against McDonald's USA on the 29th because slices of onions in a hamburger launched by the company triggered an E. coli outbreak. The report stated that Amanda McRae from Chicago and William Michael Kraft from Florida purchased a hamburger named "Quarter Pounder" this month, experiencing many symptoms related to E. coli infection. Both individuals stated that they suffered losses due to McDonald's improper conduct and would not have purchased this hamburger if McDonald's had disclosed the contamination risk. The class-action lawsuit requires McDonald's to compensate all USA citizens who purchased the "Quarter Pounder" hamburger contaminated with E. coli. The compensation amount is undetermined but is expected to exceed 5 million USD. Meanwhile, McDonald's is also facing other individual lawsuits. (Xinhua News Agency)