A customer carries a McDonald's bag outside a restaurant in El Sobrante, California, USA

A customer carries a McDonald’s bag outside a restaurant in El Sobrante, California, US, on Wednesday, Oct. 23, 2024. McDonald’s Corp. is trying to contain the fallout from a severe E. coli outbreak that appears to be linked to onions in its Quarter Pounder sandwiches, which has killed one person and sickened dozens of people across the US. Photographer: David Paul Morris/Bloomberg via Getty Images