Children such as Mackenzie Hodge, who was only ten days old when she was exposed to measles at the pediatrician’s office. As a result, Mackenzie had to be “quarantined for thirty days because she was too young to be vaccinated and could present a risk to others as a carrier if she had contracted measles” (Protecting the Herd, 439). Another example a child who relied on herd immunity was three year old, Lachlan. Lachlan had a liver transplant that may leave him immunosuppressed for his entire life. As a result, Lachlan cannot be vaccinated because his immune system cannot develop the adaptive immune response that is required. Patients like newborn Mackenzie Hodge and three-year-old Lachlan heavily rely on herd immunity. Parents and guardians who choose not to vaccinate their children create two potential problems: (1) If their child becomes