The tiny, flying creatures carry all sorts of viruses but don't get sick. How do they do that? We meet the researchers who are mapping bat genomes and studying the animal's ability to fend off inflammation. What they find could help humans better combat the next pandemic. Special thanks to...

Research on a vaccine for the new coronavirus is progressing swiftly because of the legacy of scientists working on past diseases. Some of society's most devastating viruses ended up improving the way we study illness and search for cures. We explore the thread that connects research on polio and...