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Since the 1970s, considerable attention has been paid to the management of febrile children aged ≤3 years without an obvious focus of infection. Recommendations have emphasized detection of serious bacterial infections (SBIs), including occult bacteremia (OB), and empirical antibiotic treatment for children considered to be at high risk. Management has been determined using a combination of clinical appearance, age, and laboratory tests, with more testing recommended for infants aged <3 months than for those aged 3 to 36 months.
Effective vaccines against Haemophilus influenzae type b (Hib) and Streptococcus pneumoniae, the two major causes of occult SBIs, have been universally available in the U.S. since 1988 and 2000, respectively. The inc…