Caterpillar-Grown Flu Vaccine Protects Better Than Egg-Incubated Vaccine

A DNA-based vaccine grown in caterpillar cells instead of made using chicken eggs appears to have better protected adults against infection, researchers reported Wednesday.

The vaccine, called FluBlok, is one of a half-dozen flu vaccines available on the U.S. market but it’s unique because it uses more modern technology than most flu vaccines, which are made using very old-fashioned approaches.

Image: The caterpillar larva of a fall armyworm

The caterpillar larva of a fall armyworm, also known as Spodoptera frugiperda.