The Viruses Scientists Fear Most—Ebola, Hantavirus, & H5N1 With ICU Doctor Roger Seheult

Scientists have a shortlist of viruses they watch closely—pathogens with the potential to spread globally if the wrong mutation occurs at the wrong time. At the top of that list is H5N1 bird flu. Not because it is currently spreading between humans, but because of what the scientific community believes would happen if it did. I...