These days it is well-accepted that our psychological state
affects our immune system. Psychological stress can result in
increased susceptibility to various infections and latent virus
reactivation. It is thought to be a result of interactions
between the hypothalamus, the pituitary gland and the adrenal
glands (the limbic-hypothalamic-pituitary-adrenal or LHPA axis).
LHPA axis has been identified as the main path of communication
between the immune and the central nervous system, which can be
influenced by psychological factors. The relatively young field
of psychoneuroimmunology research emerged after Ader and Cohen
(1975) showed that immune system functions can be conditioned.
Since then a number of studies have shown how various social and
behavioural factors acting on the brain can influence health,
illness, and death. Our thoughts, ideas and attitudes create
physiological changes in our bodies. For example, anger,
aggression and hostility have been shown to negatively affect
the activity and number of