Hay fever spray with azelastine could prevent infection with SARS-CoV-2 https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2838335 Antiviral Potential of Azelastine against Major Respiratory Viruses https://www.pharmazeutische-zeitung.de/azelastin-nasenspray-schuetzt-vor-corona-infektion-158557/ Azelastine reduced the rate of SARS-CoV-2 infections to a similar extent as vaccines