7Callie the calf is just your average, run-of-the-mill dairy cow, who spends her days playing in the pastures and having fun with her friends and family. Then, one day, Callie learns of a mysterious illness spreading through her herd. Everyone seems to have a lot of opinions on how to stop the virus, but how is Callie to know the truth? And even if she can, what can just one calf really do to keep her herd safe? Follow along with Callie in Callie's Quest for Herd Immunity as she learns all about contagious illnesses, vaccines, and what she (and you!) can do to keep the herd healthy.

Callie the calf goes on an adventure of a lifetime as she learns how she can help keep her herd safe from an infectious virus. Join Callie on her quest, as she learns how viruses are passed on, how masks, safe distancing, and vaccines can protect us, and what is truly needed to achieve immunity for her herd from the dangerous virus.