I am weary of hearing the same old, unsupported, dogmas about health. The same old villians keep turning up in reports, but the new ideas, often better supported and having real physiological mechanisms behind them, are neglected. It seems part of the reason is that these new ideas don't support interventions in how you live and what you eat or do. So, I plan to look at a few such instances, beginning with heart disease. The short answer is that heart disease is best explained by a viral infection.