A method of treating a patient, comprising administering at least one antibiotic, e.g., doxycycline and ciprofloxacin, sufficient to substantially treat an intracellular bacterial organism present in at least erythrocytes, e.g., over a course of at least two weeks; and subsequently administering at least one immunostimulant, e.g., which directly or indirectly increases levels of immunostimulatory cytokines in the patient, and at least one antioxidant, e.g., glutathione, to effectively treat a concurrent infection of the patient with a virus. The intracellular bacterial organism may be a rickettsiales-like organism, and the virus may be HIV.