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
Klang Shmuel, Megiddo Dalia, Lapidot Tair, Naparstek Yaakov
Expert Review of Anti-infective Therapy, doi:10.1080/14787210.2021.1908127
Objectives: Bney Brak city tops Israel's COVID-19 infection rate and mortality. Before the Jewish New Year (two-day gathering) SARS-CoV-2 PCR positivity rates were 17.6% and reached 28.1% two weeks later Taffix -an innovative nasal powder creates a protective gel over the nasal mucosa blocking viruses from infecting nasal cells, was tested for efficacy in preventing SARS CoV2 infection. Methods: In a prospective users survey, 243 members of an ultra-orthodox community that participated in two days prayers were followed for 14 days following this 'superspread' event. Eighty-three used Taffix throughout holiday's prayers and the following two weeks (ITT). Eighty-one used it regularly (PP). Two used it rarely if at all. The remaining 160 did not use Taffix. Results: After 14 days, 0/81 (0%) of (PP) Tafffix users, 2/83 (2.4%) of (ITT) Taffix users and 16/160 (10%) nonusers were infected. Odds ratio for infection among Taffix users was 0.22, a reduction of 78% (95%CI 1%-95%). No side effects reported. Conclusion: Taffix could be an additional tool against COVID19 spread, in addition to recommended safety measures. This is the first time that a prevention measure of SARS-CoV-2, beyond the use of masks, has proved effective.
Declaration of interest D Megiddo is the CEO of Nasus Pharma, the manufacturer of Taffix. T Lapidot is the VP clinical of Nasus Pharma, the manufacturer of Taffix. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
Reviewer disclosures Peer reviewers on this manuscript have received an honorarium for their review work, Peer reviewers on this manuscript have no other relevant financial or other relationships to disclose.
Author contributions SK and YN developed the study protocol and participated in the analysis of the results and the written manuscript DM and TL developed the study protocol and participated in the analysis of the results and the written manuscript as well as in the follow up and operation of the study
References
Fedullo, Schiattarella, Morlando, Mediterranean diet for the prevention of gestational diabetes in the Covid-19 era: implications of Il-6 in diabesity, Int J Mol Sci
Finlay, Amato, Azad, The hygiene hypothesis, the COVID pandemic, and consequences for the human microbiome, Proc Natl Acad Sci
Gasmi, Peana, Noor, Chloroquine and hydroxychloroquine in the treatment of COVID-19: the never-ending story, Appl Microbiol Biotechnol
Hull, Rennie, Noronha, Effects of creating a non-specific, virus-hostile environment in the nasopharynx on symptoms and duration of common cold, Acta Otorhinolaryngol Ital
Ilie, Stefanescu, Smith, The role of vitamin D in the prevention of coronavirus disease 2019 infection and mortality, Aging Clin Exp Res
Lewis, Chaudhuri, Alshamsi, The efficacy and safety of hydroxychloroquine for COVID-19 prophylaxis: a systematic review and meta-analysis of randomized trials, PLoS One
Mann, Moreau, Lapidot, TaffiX nasal powder forms an effective barrier against SARS-CoV-2, Biomed J Sci Tech Res
Murdaca, Pioggia, Negrini, Vitamin D and Covid-19: an update on evidence and potential therapeutic implications, Clin Mol Allergy
Nice, None
Popov, Emberlin, Josling, In vitro and in vivo evaluation of the efficacy and safety of powder hydroxypropylmethylcellulose as nasal mucosal barrier, Med Devices (Auckl)
Strasser, Schlich, A history of the medical mask and the rise of throwaway culture, Lancet
Sungnak, Huang, Bécavin, SARS-CoV-2 entry factors are highly expressed in nasal epithelial cells together with innate immune genes, Nat Med
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