Medical specialists said genetic predisposition and environmental factors together determine whether a person develops an autoimmune disease [1].

Understanding this relationship is critical for patients and families who fear inheriting chronic conditions. By clarifying that genetics are not destiny, doctors can reduce patient anxiety and emphasize the role of preventative health, and environmental awareness.

During an appearance on the program "CNN Sinais Vitais," Dr. Ana Luisa Garcia Calich, a rheumatologist, and Dr. Cristina Abdalla, a dermatologist, discussed these dynamics from the Hospital Sírio‑Libanês [1]. The experts said that while genetics can create a susceptibility to autoimmune disorders, they do not guarantee that family members will develop the same condition [1].

Environmental triggers often act as the catalyst for these diseases. The discussion highlighted that the interaction between a person's genetic makeup and their surroundings determines if a latent predisposition becomes an active medical diagnosis [1]. This means a relative may carry the same genetic markers as a patient but never experience symptoms if the necessary environmental triggers are absent [1].

While the discussion focused on general risk, other reports highlight the complexity of these conditions. Some research identifies five common autoimmune conditions that specifically affect women [2]. In rare cases, patients may suffer from multiple concurrent conditions; one reported case involved a woman with three different autoimmune diseases [3].

Dr. Roberto Kalil led the interview, which aired on Saturday the 20th [1]. The segment aimed to educate the public on how to interpret family medical histories without assuming an inevitable diagnosis [1].

“Genetics can create a susceptibility to autoimmune disorders, but they do not guarantee that family members will develop the same condition.”

The shift in medical discourse toward epigenetics and environmental triggers suggests that autoimmune health is not purely hereditary. This perspective moves the focus from inevitable genetic fate to a more nuanced understanding of how lifestyle and external stressors interact with DNA, potentially opening new avenues for preventative care and personalized medicine.