Roberto Giraldo

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Roberto Giraldo

Roberto Giraldo, M.D., is a specialist in internal medicine. He is a past president of the Group for the Scientific Reappraisal of the HIV/AIDS Hypothesis, a current member of the board of directors of HEAL, and is a member of the South African Presidential AIDS Advisory Panel.

Giraldo studied internal medicine at University of Antioquia, Colombia, with a major in infectious diseases. He graduated with distinction from the London School of Hygiene and Tropical Medicine, University of London, after obtaining a Master of Science in Clinical Tropical Medicine.

For four decades, Giraldo dedicated his work to clinical, academic, and research activities regarding different aspects of infectious, tropical, and immunological diseases, in various regions of Colombia, the United States, Europe, and Africa.

Much of his research has been in the field of secondary or acquired immune deficiencies, especially those occurring in developing countries. In 1967, he studied, with Professor Jacob Frenckel at the Kansas University Medical Center, Toxoplasma gondii and Pneumocystis carinii infections, as surrogate clinical markers for human immunodeficiency. Also in 1967, he studied opportunistic fungal infections with professor Donald Greer at the Centers for Disease Control (CDC) in Kansas City, Kansas. During 1974 and 1975, at the London School of Hygiene and Tropical Medicine, he studied the main risk factors for endemic Kaposi’s sarcoma, as a surrogate clinical marker for immune deficiency in African countries.

From 1979 until 1987, Giraldo worked as a clinician at a remote, rainforest region of Colombia. Here he had the opportunity to work shoulder to shoulder with indigenous traditional healers, exploring ways to address a great variety of medical issues related to poverty, malnutrition, immune deficiencies, parasites, and infections.

From 1993, Giraldo has worked as a technologist in the Laboratories of Clinical Immunology and Molecular Diagnosis at the New York Presbyterian Hospital, Weill Cornell Medical Center in New York City. Here he had the opportunity to run and know in detail the Elisa, Western blot, and PCR ("viral load") tests for HIV.

In 1997, Giraldo published AIDS and Stressors, a book arguing that AIDS is neither an infectious disease nor sexually transmitted. He proposed that AIDS is a "toxic-nutritional syndrome caused by the alarming worldwide increment of immunological stressor agents." The book was published in Spanish in 2002.


  • "Never in the history of medicine has a disease been subject to such intense public scrutiny as AIDS is today. Most people feel certain that everything that they have been told about AIDS is true. Unfortunately, none of the mainstream medical views regarding Acquired Immune Deficiency Syndrome and its purported cause, HIV, have been scientifically validated." — Response to South African Medical Journal editorial
  • "Currently, a positive result on ' the AIDS test' — ELISA and Western blot antibody tests — is synonymous with HIV infection and the attendant risk of developing AIDS. However, these antibody tests are neither standardized nor reproducible. With respect to HIV they are meaningless because they are interpreted differently for different individuals, and are interpreted variously in different laboratories and in different countries. Test interpretations vary across the United States, Russia, Canada, Australia, Africa, Europe, and South America, meaning, for instance, that a person who is positive in Africa can be negative when tested in Australia, or a person who is negative in Canada can become positive when tested in Africa. Additionally, a given sample of blood, when tested in 19 different laboratories, will produce 19 different results on the Western blot test." — Critical Analysis

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