McDonald’s previously said in a statement that early findings pointed to slivered onions on their Quarter Pounder as a possible source of the contamination.
Companies like this get an excuse to sell the same products, at the same price, with less ingredients in these moments. Yes the onions only cost then $.02 each burger, but multiply that by 6.5 million burgers sold per day.
They don't give a shit about you, they are pulling the onions to temp boost profit margin as long as they have the cover to say "out of an abundance of caution"...
Not only that, but some companies don't bring them back. I remember some outbreak happened years ago and Jimmy johns stop serving sprouts on some of their sandwiches. I was assuming they would be back after the outbreak was over, but no. I still eat my sandwiches from their sprout-less.
First they came for the arugula and I did not speak out because arugula is meh. Then they came for the sprouts and I did not speak out because sprouts are whatever. Then they came for the me and my onions and there was no one left to speak for us...because they all had food-borne illnesses.
It's usually uncomposted manure or the proximity to pasture soil that infects vegetables with E. coli, so it's still a result of the animal agriculture industry.