The FDA has upgraded its ongoing egg recall to class 1, the most serious classification for recalls.More than 4 million eggs, supplied by Milo's Poultry Farms, were voluntarily recalled in early September due to potential Salmonella contamination.

The recall was originally announced Sept. 6 by the Centers for Disease Control and Prevention, and was upgraded Sept. 30 to Class I, a product that "will cause serious adverse health consequences or death.

As of September 6, the FDA and the CDC have reported 65 infections, 24 hospitalizations, and zero deaths linked to the recall. The reported infections came from people in Wisconsin, Illinois, Michigan, Iowa, Minnesota, Virginia, Colorado, Utah, and California.