Do not inject intravascularly. Do not give by IM route to persons w/ bleeding disorder (eg, haemophilia or thrombocytopenia) or on anticoagulant therapy. Yellow fever vaccine-associated neurotropic disease. Do not administer to immunosuppressed patients & those w/ symptomatic or asymptomatic HIV infection. Delay vaccination until at least 1 mth after completing the course in patients who received systemic corticosteroids for ≥14 days. False positive results w/ laboratory test for other flavivirus diseases (eg, dengue or Japanese encephalitis). Do not use during pregnancy & lactation. Childn born to HIV positive mothers. Not recommended in childn 6-9 mth. Elderly ≥60 yr.