Iinfluenza and ARI intensity in Bulgaria was low during week No 37(10.09.2012 -16.09.2012) and the total incidence per 10,000 population was 25.41(during week No 36  the incidence was 15.78 ). From a total of 380,239 persons under surveillance, belonging to all age groups, a total of  966 ARI cases have been reported (during week No 36 the cases were 600). The incidence was highest in the age group 0-4 yrs (117.68 per 10,000 population), followed by age group of 5-14 yrs (60.40 per 10,000).