Similac Alimentum Hypoallergenic Infant Formula, imported from Puerto Rico, is for sale at a Stew Leonard's grocery store in Yonkers, New York, Friday, June 10, 2022. The FDA acknowledged Tuesday, Sept. 20, that its response to the national shortage of infant formula was slowed by delays in processing a whistleblower complaint and test samples from the nation’s largest manufacturing plant. A 10-page report from the agency offers the first formal account of the factors that led to the ongoing infant formula shortage. (AP Photo/Ted Shaffrey, File)