28. Question : Which organism is a common sexually transmitted bacterial infection?

29. Question : The coronary ostia are located in the:

30. Question : Which type of immunity is produced by an individual after either natural exposure to the antigen or after immunization against the antigen?

31. Question : What is the most common cause of insufficient erythropoiesis in children?

32. Question : Blood vessels of the kidneys are innervated by the:

33. Question : Between which months of age does sudden infant death syndrome (SIDS) most often occur?