People around me cough, sneeze, sniff, scratching their face, head, body, nervous, probably because of
the effect of
histamine in their body. I might have the stimulus of their allergic reaction of the immune system.
As it can be by phone, skype, behind a wall and a window on the street, it is likely that this occurs psychosomatic through nervous tension. That is, people unconsciously copy a certain state of the autonomic nervous system, which launches in their body histamine.