Slivered onions are likely cause of McDonald's E. coli outbreak, CDC says
Briefly

The CDC has identified slivered onions as the likely source of the multi-state E. coli outbreak linked to McDonald’s Quarter Pounder burgers, with beef patties testing negative.
McDonald's has indicated that Quarter Pounders without onions will be back on the menus soon, as they believe the continued risk to the public is very low.
In total, the outbreak has now reached 90 cases across 13 states, with 27 hospitalizations and one death, indicating a serious public health concern.
The CDC urged caution, stating that the time frame for linking illnesses to an outbreak can take three to four weeks, suggesting more cases may emerge.
Read at Ars Technica
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