Iinfluenza and ARI intensity in Bulgaria was low during week No 36 (03.09.2012 -09.09.2012) and the total incidence per 10,000 population was 15.78(during week No 35  the incidence was 21.91 ). From a total of 380,239 persons under surveillance, belonging to all age groups, a total of  600 ARI cases have been reported (during week No 35 the cases were 833). The incidence was highest in the age group 0-4 yrs (73.61 per 10,000 population), followed by age group of 5-14 yrs (40.06 per 10,000).