Not everything retro is chic. Especially when it comes to preventable contagious diseases.

A small but growing number of parents disagree, though. Through their actions — or their inactions, as it were — these families are resuscitating already cured diseases dreaded by our grandparents. And as these parents question the value of lifesaving vaccines, whether in the name of parents’ rights or opposing big pharma and its chemicals, all of our children will be affected.