The rate of infectious agents also increases with age groups from 18 - 25, 25 - 34; 35 - 49 and 50 - 60 of which the lowest was the age group 18 - 24 with the rate of HBsAg, HCV, The idiopathic for HIV and syphilis are 0.54%, 0.11%, 0.07% and 0.09% respectively.