Abstract: The present disclosure provides recombinant nucleic acids comprising one or more polynucleotides encoding a polypeptide (e.g., an inhaled therapeutic polypeptide, such as a human alpha-1-antitrypsin polypeptide); viruses comprising the recombinant nucleic acids; compositions and formulations comprising the recombinant nucleic acids and/or viruses; methods of their use (e.g., for delivering the polypeptide to one or more cells of the respiratory tract and/or for the treatment of a disease affecting the lungs, such as alpha-1-antitrypsin deficiency); and articles of manufacture or kits thereof.