Absolute contraindications to organ donation include diseases that may cause adverse effects to the recipient, such as malaria, HIV, active hepatitis B virus infection, and active visceral or hematologic neoplasm. The recipient of an organ from a donor with syphilis is tested for antibodies and treated prophylactically. The organ of a donor who has a meningococcal sepsis can be recovered after 24-48 hours of antibiotic coverage. Influenza is not a contraindication for organ donation.