"Concurrent illness" refers to having multiple illnesses or diseases at the same time. It means a person is experiencing two or more health conditions simultaneously. Full definition
Another possibility is the presence of concurrent illnesses associated with obesity, which may interfere with the ability to deliver effective treatment. (uchospitals.edu)
If it was tested for and was lower than normal, hypothyroidism is likely, if there is no other concurrent illness. (vetinfo.com)
Topics will include insulin choice, diabetic monitoring, and management of diabetes in the presence of concurrent illness. (vet.purdue.edu)