Phyllis J. Kuhn, Ph.D., developed the Well Mask, which is a standard face mask with a copper mesh insert. Testing shows that Kuhn’s masks kill about 90% of germs within…
Phyllis J. Kuhn, Ph.D., developed the Well Mask, which is a standard face mask with a copper mesh insert. Testing shows that Kuhn’s masks kill about 90% of germs within…