Lubbock Avalanche-Journal - Face covers made of ordinary cloth may not have aerosol protection capabilities but serve two important functions. They will help prevent unintentional spread of air droplets, which may or may not contain airborne toxic microbes such as virus particles, and secondly, they give a sense of confidence and comfort among the public.
"Face covers' material make up, structure and design aspects will be determining factors. Face covers boost psychological comfort and to an extent help to contain one's exhalations. Face covers do certainly enhance social distancing," said Dr. Seshadri Ramkumar, a professor in the department of environmental toxicology at Texas Tech.