Case definitions for infections sought in systematic review of severe febrile illness in low- and middle-income countries.

<p>NAAT = Nucleic acid amplification test; MAT = microagglutination test; IFA = immunofluorescence assay; HAI = haemagglutination inhibition assay.</p><p>Case definitions for infections sought in systematic review of severe febrile illness in low- and middle-income countries.