anti-viral immune response

It is widely agreed that competition, or lack thereof, in health care is a problem.  The Wall Street Journal recently showed how Viagra and Cialis prices seem to move -- up, of course -- in lockstep. USA Today found Walgreens charging 1237% more than Costco, for the same drug.  Economists like Martin Gaynor have been discussing problems with competition in health care for years. The Harvard Business Review just published a lengthy article on the problem. But, it turns out, we may be ignoring an important competition that has real impacts on our health: with each other...