COVID-19 killer air filter developed by scientists amid airborne risk
(World News Science)

A study, published in the journal Materials Today Physics, found that 99.8 percent of the Covid-19 virus was killed in a single pass through a filter made from commercially available nickel foam heated to 200 degrees Centigrade (Celsius), or about 392 degrees Fahrenheit. It also killed 99.9 percent of the anthrax spores in testing at the Galveston National Laboratory, which is...