Iinfluenza and ARI intensity in Bulgaria  was low during week No 20  (11.04.2015-17.05.2015).   The total incidence  per 10,000 population  decreased and was 49.20 (during week No 19 the incidence was 42.59). From a total of 384 354 persons under surveillance, belonging to all age groups, a total of 1891 ARI cases have been reported (during week No 19 the cases were 1637). The incidence was highest in the age group 0-4 yrs (229.87 per 10,000 population), followed by age group of 5-14 yrs (129.75 per 10,000).