Living through the COVID-19 pandemic, we sometimes forget that there have been, and will be, other pandemics. Many of these pandemics have involved flu. In this episode of the Virulent Vortex, Katia Koelle explains how pigs provide the ideal mixing vessels for bird flu viruses to create strains that are highly contagious. Vaccinating pigs or limiting contact between pigs and birds could help prevent the next pandemic.