Medical start-up EmitBio thinks it may have a solution for those suffering from low-grade coronavirus, and even the flu and other viruses. It is testing a handheld LED device that delivers light with precise frequencies, which, when shined to the back of a patient’s nose and throat, can provoke an immune response. So far, the results look good, with 99.99% elimination of the delta variant of coronavirus in lung cells after three days of shining the light twice a day for about five minutes. The device could even be used at home. What an amazing technology.