The second way it could be magic is much more disturbing
(For more on this, read Stay Sharp in The Offseason By Following the Way of the Farmer , available here on the NCOAE Blog.) The industry standard when traveling with groups on guided trips in the backcountry is the use of chemical treatment, typically Iodine
The results were published in the New England Journal of Medicine

It has been shown that GLP-1 analogue exenatide could activate the human monocyte-derived macrophage towards M2 phenotype ( -/- mice with a concomitant upregulation of M2 marker CD163 ( +/- mice, a -cellspecific glucokinase haploinsufficient (Gck+/) diabetic model ( 2.2 The role of GLP-1 in innate-like T lymphocytes Invariant Natural Killer T (iNKT) cells are a subpopulation of T lymphocytes that bridge the innate and adaptive immune systems ( 2.3 The role of GLP-1 in intestinal epithelial lymphocytes As a innate like lymphocytes, intestinal epithelial lymphocytes (IELs) patrol the lamina propria and play a critical role in host-bacteria interaction, wound healing, mucosal growth and regeneration, and inflammation ( -/- mice, while the numbers of CD4+ and CD8+ T cells and B cells in the spleen and lymph nodes had no differences ( 3 The role of GLP-1/GLP-R axis in related signal pathways GLP-1 is known to increase insulin secretion by cells under hyperglycemic conditions

Nature 443 , 448452 (2006)
10.2147/CCID.S128339 264 WesterhofW.KooyersT