Of positive flu samples at national labs, 68.5% were influenza, and of subtyped samples, 66.2% were the 2009 H1N1 virus.
Patient interviews suggest ground beef bought from the same grocery chain, and an investigation into the source is underway.
Of 22 patients interviewed, 15 said they ate Papa Murphy's raw chocolate chip cookie dough or raw s'mores bars dough.
Cases caused by Campylobacter, Listeria, Salmonella, and Shigella stayed the same, but those tied to Cyclospora, Escherichia coli, Vibrio, and Yersinia rose.
The FDA warns consumers and retailers in 3 states about raw oysters imported from South Korea that may be contaminated with norovirus.
The outbreak has so far sickened 26 people in Illinois, with a few cases in other states.
The most common pathogens involved in outbreaks with a confirmed or suspected agent were norovirus and Salmonella.
Of 14 case-patients interviewed, 12 ate food from Papa Murphy's, including 9 who ate raw cookie dough and 1 who had baked with it.
Investigations in the hepatitis A outbreak point to organic strawberries imported from Baja, Mexico, in 2022.
Eleven outbreaks in 25 years included 187 Salmonella cases and 42 hospitalizations across 21 states.