<s>[INST] <<SYS>> This is a medical question of type : exams and tests <</SYS>> How to diagnose Kyasanur Forest Disease (KFD) ? [/INST] Diagnosis can be made in the early stage of illness by molecular detection by PCR or virus isolation from blood. Later, serologic testing using enzyme-linked immunosorbent serologic assay (ELISA) can be performed. </s>