Pestka Biomedical Laboratories (PBL InterferonSource), Inc. We are the world’s largest source of interferon and related products, service, information, and know-how. We’re here to help you maximize your progress in the lab because, as immunologists, we all share a common path. Like you, we began this journey out of fascination. The pioneering interferon research done by our founder, Sidney Pestka, M.D., reflects decades of exploration into interferon's applications in medicine. Like you, we continue this journey because we believe in our work. We recognize interferon’s great potential to help treat a wide range of debilitating illnesses including hepatitis (B and C), multiple sclerosis, viral infections, and cancer. In fact, Dr. Pestka was the first to develop a commercialized biotherapeutic, Roferon A in 1986 for treatment of hairy cell leukemia. Like you, we are determined to see interferons benefitting patients affected with a wide variety of diseases. With over 200 years of collective interferon research experience, we can and will help you in your research efforts wherever you are in the world.