David Liss said this quote

Coffee, he insisted, has all but destroyed the plague in England. It preserves health in general and makes those who drink it hearty and fat; it helps the digestion and cures consumption and other maladies of the lung. It is wonderful for fluxes, even the bloody flux, and has been known to cure jaundice and every kind of inflammation. Besides all that, the Englishman wrote, it imparts astonishing powers of reason and concentration. In the years to come, the author said, the man who does not drink coffee may never hope to compete with the man who avails himself of its secrets.