A second Missouri healthcare worker who had contact with a hospitalized patient infected with bird flu developed mild respiratory symptoms but was not tested for the virus, U.S. officials said on Friday.

A third close contact of a patient in Missouri who was hospitalized with H5N1 bird flu has reported that they also experienced symptoms, the US Centers for Disease Control and Prevention said Friday.

A second health worker in contact with the Missouri patient who tested positive for bird flu also developed symptoms but wasn’t tested for influenza, the CDC said Friday.

Health officials identified three contacts, including two healthcare workers, who were closely monitored after a bird flu patient in Missouri was recently hospitalized.