I think different people have different immune responses (white blood cells/histamines/antibodies) to the saliva (proteins) of the invading parasites.
Some immune systems decide the foreign invasion requires an immediate and dramatic response (welts), and others just shrug. The bugs are attracted by
heat and CO2, so I think we are all targets. At least that’s what I’ve read.
[Edited on 5-11-2018 by Alexmcnc] |