by Adair Locke, MD. 1  Methylene blue is administered intravenously by anesthesia providers for a variety of clinical uses and may be used with increasing frequency as an intraoperative urologic marker dye due to an indefinite nationwide shortage of indigo carmine.
The Effects of Humidity on the Human Body. As discussed in Home Humidity and Allergies, humidity directly affects the amount of allergens in the indoor environment. In particular, high humidity causes both dust mite populations and mold colonies to grow, thereby greatly increasing allergy sufferers' total allergen load.
Relative humidity clearly depends on two factors: the amount of water vapor present in the air (now the other gases are present, of course, but they have no bearing on relative humidity) and, second, ... drum roll, please... temperature. Okay, now we're getting down and dirty and just about ready to help poor Hale.