4 = mucopurulent sputum, 5 = purulent sputum. c Night-time awakenings evaluated on a 5-point scale: 0 = none, 1 = minimal, 2 = infrequent, 3 = frequent, 4 = numerous.

I initially became hooked on ID when I was a medical student rounding on ID service and was evaluating a person with pneumonia who had just expectorated purulent sputum. As a physician trained in ...