The present invention relates to a composition comprising Lactobacillus rhamnosus, preferably strain ATCC53103, and Bifidobacterium animalis subsp. lactis, preferably strain DSM 15954, for use in reducing the duration and/or severity of upper respiratory tract infection (URI) in teenagers and adults. Further aspects of the invention relate to a composition comprising Lactobacillus rhamnosus and Bifidobacterium animalis subsp. lactis for use in increasing the Health-Related Quality of Life (HRQL) in teenagers and adults having upper respiratory tract infection (URI), for reducing at least one and preferably several such as two, three, four or all of the symptoms of sore throat, scratchy throat, cough, hoarseness, chest congestion and for reducing the median severity score in teenagers and adults having upper respiratory tract infection (URI).