Rollins knocks down Grassley's suggestion of vaccine for screwworms

Senate Judiciary Chair Chuck Grassley (R-Iowa) urged Agriculture Secretary Brooke Rollins to create a vaccine for New World screwworms on Wednesday after the parasite infestation returned to the US for the first time in 60 years.

Grassley said he’d spoken to Rollins about developing a vaccine for screwworms months before the recent outbreak in Texas. ...