Iinfluenza and ARI intensity in Bulgaria was low during week No 23 (03.06.2013 -09.06.2013) and the total incidence per 10,000 population was 34.86 (during week No 22 the incidence was 35.33 ). From a total of 381 562 persons under surveillance, belonging to all age groups, a total of  1 330 ARI cases have been reported (during week No 22 the cases were 1 348 ). The incidence was highest in the age group 0-4 yrs (147.88 per 10,000 population), followed by age group of 5-14 yrs (107.33 per 10,000).