They stopped the treatment for one person in the experiment group treated with 25 microgram dosage, because they showed a side-effect of itchy skin.
There is a bunch of white blood cells that produce things called cytokines which act as messengers on immune response. When you want to kill a pathogen you produce Th1. When you produce too much of it you risk killing your own tissue to cancel that you produce Th2. A balance between Th1 and Th2 is needed so that you don't kill yourself while trying to kill pathogens.
There is a bunch of white blood cells that produce things called cytokines which act as messengers on immune response. When you want to kill a pathogen you produce Th1. When you produce too much of it you risk killing your own tissue to cancel that you produce Th2. A balance between Th1 and Th2 is needed so that you don't kill yourself while trying to kill pathogens.
P.S.: not an immunologist.