With outbreaks of bird flu on farms, Human Health and Services Secretary Robert F. Kennedy has a suggestion to fight the flu: let it spread.

Health secretary RFK, Jr. has repeatedly suggested that farmers should let bird flu spread through flocks. Experts explain why that’s a dangerous idea

One of the ways it can spread to healthy poultry farms is by a single infected duck visiting a flock and shedding the virus through feces. H5N1 kills relatively quickly, causing respiratory distress, swelling, lack of coordination and other symptoms before death. (Culling is therefore considered more humane.)