P80 natural essence spray and lozenges provide respiratory protection against Influenza A, B, and SARS-CoV-2.

"Declarations Ethics approval and consent to participateWritten informed consent was obtained from all donors of leftover nasopharyngeal/ oropharyngeal specimens and EDTA blood by the participating clinics. The Ethics Committee of the Medical University of Innsbruck approved the study (ECS1166/2020). Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This research was funded in whole or in part by the Austrian Science Fund (FWF) [Grant DOI: 10.55776/P33510 to D.W and Grant DOI:10.55776/P34070 to W.P]. For open access purposes, the author has applied a CC BY public copyright license to any author accepted manuscript version arising from this submission."