The ongoing COVID-19 pandemic has demonstrated that rapid medical testing was an indispensable need of healthcare systems worldwide to identify high-risk patients who need urgent treatment. Designing novel materials and biosensors for applications in medical technologies are key to saving lives and delivering efficient, reliable, and low-cost solutions for clinicians and patients. Medical technologies can be developed as benchtop handheld, and wearable biochemical sensors to collect biomarker information for diagnosing metabolic disorders, diseases, and infections.