Allergy for people

People are living creatures and so they have that stuff of metabolism and there are things they radiate and things they exhaust, if it is okay to say so, in most cases, those are the same thing for all people, but there are also cases when the nature and the formula of the metabolism stuff f a person is different from others. And there is nothing wrong with this person and there is also nothing wrong with metabolism or something, though this person may be dangerous for others. It is a rather rare kind of allergy though it does exist and it is the weirdest kind, as the matter of fact. There are people of different and abnormal reaction for sweat or saliva of other people. And when such a person of different metabolism stiff is next to them they may have asphyxia or rush or something, well, any other symptom common for allergy. And there is no treatment for these people, the only way pout for them is to avoid those that provoke allergic reaction of them. It is weird but it is real, you know.