In this study, we investigated the biological effects of RF (Radio Frequency) and microwave in terms of neurological and biochemical findings, and CD4/CD8 ratio in people that work at broadcasting and television transmitter stations. The study was carried out on 26 people from 20 to 49 years of age, occupationally exposed to nonionizing radiation. First we gave out a questionnaire consisting of 12 questions to everybody under investigation. Secondly, we determined the levels of ALT, AST, LDH, ALP, CK, phosphorus, total protein, albumin cholesterol, uric acid, urea, creatinin, Na, K, and NSE (Neuron Specific Enolase), and also CD4/CD8, albumin/globulin ratios and percentage of serum proteins. The results obtained in this study were statistically compared to a control group.