The goal of this clinical trial is to learn if MM09 works to treat patients allergic to house mites, displaying rhinitis/rhinoconjunctivitis with or without mild to moderate asthma. It will also learn about the safety of MM09. The main questions it aims to answer are:
Does MM09 reduce the symptoms and the need of rescue medication? What medical problems do participants have when inhaling MM09? Researchers will compare MM09 to a placebo (a look-alike substance that contains no drug) to see if MM09 works to treat rhinitis/rhinoconjunctivitis.