The evaluation of young febrile infants continues to be controversial. At the center of this debate is the utility of the laboratory evaluation, particularly in the presence of an apparent viral source of fever. In their retrospective review, Purcell and Fergie document the low risk of concurrent SBIs.1 These data add to a growing body of evidence on this topic.2-4 Although RSV may cause fever,3 an occasional infant with RSV may have a concurrent SBI, typically, a urinary tract infection.1,3,4