Sensors that track everything from infection in the lungs to WiFi usage on a busy university campus are poised to enhance our understanding of, and approach to improving, human health at many levels — a trend that has been accelerated by the challenges of the Covid-19 pandemic, researchers and experts said at the 2020 SENSE.nano Symposium. Videos from the event are now available online, so anyone can view the presentations and panel discussions featuring leaders from research and industry, representatives of MIT-launched startup companies, and current MIT graduate students. Held…