Vaccines And Immune Memory Practice Test

A 9-month-old infant, who has a medical contraindication to receiving the MMR vaccine, lives in a community where the vaccination coverage for MMR is 98%. Despite a regional outbreak of measles, the infant does not contract the disease.

A 52-year-old woman presents to the emergency department with a deep, contaminated laceration on her leg after a gardening accident. Her immunization records show her last tetanus booster was 15 years ago. She is given a dose of the tetanus toxoid vaccine.