Is it true that wearing face masks is useless in preventing the contraction of the COVID-19 virus be

Greatly Efficient at Filtering out Virus, Bacteria Mold Particles, Pollen and Dust.

Fillers >95% solid aerosol only, viz. Water based aerosol particulate, Carcinogenic, enzymes articles of size 0.3 µm. Bacteria filtering efficiency >98% (BFE) of particle size 0.1 μm