The Effect of a Probiotic on Upper Respiratory Tract Infections

Exclusion Criteria

• •1. Any known concomitant chronic infections, chronic systemic diseases, autoimmune diseases (e.g. asthma), immunodeficiency, metabolic diseases, chronic respiratory tract diseases including respiratory allergies and cystic fibrosis, congenital cardiac defects.
• •2. Suspected or challenge-proved food allergy
• •3. Use of any prescribed immune suppressive medications at enrolment
• •4. Use of oral or IV antibiotics in the 1 month before randomisation
• •5. Not willing to exclude pre/pro/synbiotics during the study
• •6. Intake of Echinacea, high dose vitamins or Zinc four weeks before and during the study period.
• •7. Language limitations regarding interviews or questionnaires
• •8. Participation in other clinical studies in the last 2 months
• •9. Planning extensive travel (for \>1 month) during the duration of the study