Low pH Hypromellose (Taffix) nasal powder spray could reduce SARS-CoV-2 infection rate post mass-gathering event at a highly endemic community: an observational prospective open label user survey
Shmuel et al., Expert Review of Anti-infective Therapy, doi:10.1080/14787210.2021.1908127
https://c19early.org/shmuel.html