Iinfluenza and ARI intensity in Bulgaria  was low during week No 31 (27.07.2015-02.08.2015).   The total incidence  per 10,000 population  decreased and was 27.81 (during week No 30 the incidence was 27.68). From a total of 384 354 persons under surveillance, belonging to all age groups, a total of 1069 ARI cases have been reported (during week No 30 the cases were 1064). The incidence was highest in the age group 0-4 yrs (145.13 per 10,000 population), followed by age group of 5-14 yrs (65.18 per 10,000).