 The goal of this study is to determine whether survivors of Legionnaires disease suffer smell loss. A quantitative olfactory test will be performed by the participants. Such testing will require approximately 20-30 minutes of the participants time. The participants will take the University of Pennsylvania Smell Identification Test UPSIT, a scratch-and-sniff test to assess their ability to identify odors in a forced- choice format. Volunteers will also complete a questionnaire asking personal history, demographic questions, and medical history. 