Dr Vivian Rambihar, Toronto cardiologist for 40 years and Adjunct Assistant Professor of Medicine at the University of Toronto, has been involved in chaos and complexity for 30 years, graduating from the new and innovative McMaster Medical School in 1975, which he has termed a complexity medical school. Around 1990 he was fortuitously exposed to 4 publications – Fascinating Rhythm: a Primer of Chaos Theory and its application to cardiology – Denton et al, 1990 AHJ, books - Turbulent Mirror 1990 by Briggs and Peat, Fractals: the Patterns of Chaos 1992 by Briggs, and Chaos Making a New Science 1987 by Gleick, which transformed his thinking and led him to rewrite medicine form a chaos and complexity perspective. He convened a multidisciplinary conference on Chaos in Medicine at the University of Toronto in 1993, and has lectured widely on using ideas from chaos and complexity in medicine, health, society, and diversity and health, being the first to do so in medicine. He has written a few books – CHAOS From Cos to Cosmos: Making a New Medicine, 1997, A New Chaos Based Medicine: the response to evidence, 2000 and Tsunami Chaos Global Heart: using complexity science to rethink and make a better world, 2005, the later available free online. He has advocated complexity thinking for educating health professionals and doctors for the 21st century to deal with complex 21st century issues, and has advocated using chaos and complexity for understanding and stopping Covid-19, through lectures, writing and posts. He feels that since complexity is thought to be the science for the 21st century by Stephen Hawking, it should apply to medicine, health, society, and Covid-19.