Viral infection laboratory testing by means of direct fluorescent antibody (DFA) testing
and viral cultures has been used to stratify the risk of bacterial infections in febrile
infants. The newer respiratory virus polymerase chain reaction (RVPCR) is a more sensitive
test for detecting respiratory viruses. RVPCR also allows for the detection of a greater
number of viruses including human rhinovirus (HRV).
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