Coronavirus update: Nasal spray Taffix kills coronavirus

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In existing products, the particles range from between 0.2 microns and 400 microns, with an average particle size of 72.6 microns.

By comparison, particles in Taffix range from only 10 microns to 100 microns in size, and their average size is 19.1 microns.

There is also a lot of variation in the shape of particles found in commercial HPMC products, note the researchers, which creates gaps and weak points in the gel coating.

By comparison, the particles in Taffix are uniformly spherical, which makes them more effective at stopping viruses and other small particles from reaching nasal membranes.

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