Bacterial culture, Enterovirus, CMB, EBV, Adenovirus, Histoplasma, Cryptococcus, Aspergillus Galactomannan, Typhus Fever Antibody, HSV1, HSV2, Parvovirus B19, HHV‐6, HHV‐7, HHV‐8, Bartonella IgG/IgM, Toxoplasma WB PCR, Toxoplasma IgG/IgM, Strongyloides IgG, Ureaplasma, Karius, West Nile, Mycoplasma Hominis, Hepatitis B, Hepatitis C, Hepatitis E, Varicella Zoster, Lymphocytic Choriomeningitis Virus, Parasites Smear, HTLV‐I/II Antibodies, BK Virus, JC Virus, HIV Panel, HIV‐1 RNA. This evidence concerns the gene CD40LG and typhus.