Why do viruses go viral?

The novel coronavirus that causes COVID-19 has led to a pandemic that swept the globe, halted economies and upended life as we know it. How and why infections like this occur is something that Melissa Maginnis, an assistant professor of microbiology at UMaine, thinks about every day. How do viruses work? How and why do they go viral? What is the best way to stop their spread and how might scientists learn from this ordeal? That and more on this episode of The Maine Question.