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Also, changes in the immune system will have more effect on health among those whose immune systems are already weakened.Already under severe pressure from all sides, the empire was further weakened by competition amongst different groups of nobles.Figureure 4 depicts this sequence comprising negative emotions, release of stress hormones which lead to weakening of the immune system, thereby affecting mental and physical health.A Famine is characterised by wide spread deaths due to starvation and epidemics caused by forced use of contaminated water or decaying food and loss of body resistance due to weakening from starvation.With economic development, large scale URBANISATION, growth of literacy and education, OCCUPATIONAL MOBILITY and the weakening of the position of landlords in the villages, the old notions of CASTE HIERARCHY are breaking down.