Influenza and ARI intensity in Bulgaria was low during week No 27 (03.07.05.2017-09.07.2017). The total incidence per 10,000 population was 29.44 (during week No 26 the incidence was 28.42). From a total of 382 104 persons under surveillance, belonging to all age groups, a total of 1 125 ARI cases have been reported (during week No 26 the cases were 1 086). The incidence was highest in the age group 0-4 yrs (149.09 per 10,000 population), followed by age group of 5-14 yrs (78.76 per 10,000).