Electrochemical detection of viruses and antibodies: A mini review

•Highly sensitive electrochemical sensors for viral DNA enables early detection of disease.•Antibody testing allows the extent of disease and the immunity status of recovered individuals to be assessed.•Sample-to-answer devices open up testing in the community.•Integration of sensors, and wireless technologies enables autonomous, point-of-care applications.•Challenges remain in terms of selectivity, shelf-life, manufacturability and the use of sustainable materials.