An E. coli outbreak linked to McDonald’s Quarter Pounders has led to at least 49 illnesses across 10 states, including one death.

Health officials are investigating an E. coli outbreak linked to McDonald’s Quarter Pounders in multiple states, the Centers for Disease Control and Prevention said Tuesday.

Federal health officials have linked an E. coli outbreak to McDonald’s Quarter Pounders sold in several states.One person from Colorado has died and dozens of others have been sickened in 10 states, the Centers for Disease Control and Prevention said.