This course will focus on training students in diagnostic methods and the fundamentals and design of biosensors that are used in clinical diagnostics. Several biosensors are currently in use in diagnostic applications. They range from glucose sensors to PCR-based pathogen detection. The topics covered in this course will give students background on how these biosensors are designed, what are the biological recognition elements used, how to design portable platforms, what characteristics are needed for clinical use, how to use it, etc. An example of the target such as glucose, COVID-19, blood chemistry, will be used to explain constructions and fundamentals of biosensors. A background on recombinant DNA methods and protein chemistry, reporter probes, biological recognition elements, miniaturized analytical devices, point of care diagnostics. immunoassays, nucleic acid sensing, etc. will be covered in the course. The course will also cover culturing methods and detection of heavy metal in clinical samples. The topics covered in this course train students in multi-disciplinary fields including biochemistry, medicine, diagnostics, chemistry, and biology.