The CDC is investigating a deadly outbreak of E. coli that has sickened almost 50 people let to the death of one man in Colorado. The CDC says it was first alerted to the problem almost two weeks ago and the number of illness could go up.

So far, 49 illnesses have been reported in 10 states, including 10 people who were hospitalized. One of those hospitalized is a child who developed hemolytic uremic syndrome, a serious complication that can develop from an E. coli infection. An older person has also died in connection with the outbreak.