Answer to Question 1
ANS: B
Birth weight and length of gestation are the most important predictors of infant health. Although maternal education, income, and lack of prenatal factors are factors associated with preterm birth and low birth weight, at the time of birth it is most important to assess the weight of the infant and length of gestation. Using the Apgar score at birth is not as informative of a tool for assessing newborn health as the birth weight and length of gestation.
Answer to Question 2
ANS: A
Substantial reductions in HIV seroprevalence occurred after several countries deployed ABC (Abstinence, Be faithful, Condom use) strategies. There is not an immunization available to prevent HIV. The ABC strategy involves use of all three strategies, not just abstinence or condom use.