Henley Ion Inc. is encouraged by early testing of a COVID-19 protection device. Henley’s Ion Virus Defender technology uses micronized electrostatic precipitation (mEP) to remove infectious bioaerosols from both inhaled and exhaled air. The company said initial tests of the prototype removed 99.8% of SARS-CoV-2 bioaerosols under Biosafety Level 3 testing conditions.