Nearly a month after a five-state recall of eggs sold at Costco, the FDA now says consumption of the recalled eggs could "cause serious adverse health consequences or death."

FDA escalates Costco egg recall to Class I, its highest risk level, over salmonella concerns. Learn what Class I means, how recalls escalate, and what it means for you.

Costco recalls eggs from Handsome Brook Farms due to salmonella risk, affecting items distributed in several US states.