As of February 1, 2021, a total of 16 people infected with the outbreak strain have been reported from 5 states. This map shows where sick people live.
Illnesses started on dates ranging from December 23, 2020, to January 7, 2021. This chart shows when people got sick. Recent illnesses may not yet be reported as it usually takes 2 to 4 weeks to link illnesses to an outbreak.
Sick people range in age from 10 to 95 years, with a median age of 31, and 88% are female. Of 12 people with information available, 9 have been hospitalized. Of 11 people with information, 3 developed a type of kidney failure called hemolytic uremic syndrome (HUS). One death has been reported from Washington.
Investigation Details — https://www.cdc.gov/ecoli/2021/o157h7-02-21/details.html

“Unknown food source” bothers me.
Yes this is scary. Lettuce again?
My bets are on either Romaine lettuce or raw chicken. There are chicken processing plants in OK and AR.
Or both!