Trying to physically place barriers to viral transmission is a futile effort. Viruses have been with us since the beginning, and they are extremely well-adapted to finding a way to survive. We would do far better to encourage behaviors to enhance our immune systems (de-stress, vitamins, exercise, etc) than trying to continue to "keep it out!" All we are doing is stressing people out and thereby diminishing said immune system. Walk away from the fear porn, people. Death is a part of the cycle of life, and we have little control over when or how it is coming. Can we live with that?