Two questions in the January 1, 1999 “Clinical Quiz” are incorrect or poorly worded. Question 5, pertaining to the article “Poliovirus Vaccine Options” (page 113), is poorly worded. Choice A is better phrased this way: The IPV/OPV dosing schedule provides a 50 percent reduction in the cumulative number of cases of VAPP. Choice E is better phrased this way: It is always safer for children with congenital immunodeficiencies. The correct answer to Question 5 remains E.

Question 15, pertaining to same article, is also poorly worded. An all-OPV vaccination schedule is only acceptable in special circumstances. The question is better stated this way: “Which of the following dosing schedules is/are generally acceptable for poliovirus vaccination?” The correct answers for Question 15 are A and B.