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The ability of a child to follow a one-step command should be acquired by what age?    

Approximately what percentage of individuals in the population must be immunized for herd immunity to be effective in the community?  

Which of the following is most consistent with a normal developmental examination at his 2-year-old visit?    

A 7-year-old presents with recurrent pruritic, erythematous, inflammatory lesions over her antecubital and popliteal fossae. The lesions are not plaque-like in appearance, and respond to topical steroid application. What is the most likely diagnosis?    

Haemophilus influenza type B (Hib) vaccine is NOT associated with which of the following diseases?  

Which of the following conditions would cause the clinician to be most concerned about a new mother?  

The parents of a 6-month old male are very concerned that their child doesn’t have any teeth. They are very excited to feed their child more advanced foods, and ask you when the child will get his teeth. Which of the following is the most appropriate answer for the parents?  

At what age is it safe to transition an infant from breastmilk or formula to cow’s milk?  

You are performing a sports physical on a 14-year old boy who wants to join the basketball team. He reports a dull, achy pain in his scrotum when standing that has been present for more than a week. Upon examination of the scrotum you note a “bag of worms” texture. There is no apparent transillumination and the cremasteric reflex is intact. What is the most likely diagnosis?  

You are seeing a 2 year old girl for at an urgent care clinic. Mom reports her daughter had a 104 degree fever for 4 days and then yesterday a horrible rash appeared on her chest. Upon exam you note a non-blanching maculopapular pink rash on the trunk, extremities and head. There is no sign of escoriation, no associated adenopathy. The rash is depicted in the photograph below. What is the most likely diagnosis?