It takes the heart about one minute when the body is at rest to pump blood to every cell in the body. That means that the light at the end of the needle that is inserted into your vein is exposing every component of your blood every minute to the type of light being used. Have you seen this Trump press conference with a breakdown of how the Biological Warfare Division tested the Cov19 virus to determine what conditions change it's ability to survive? Watch this press conference video from April 2020 from time stamp 20:00 to about 27:30 where he explains what "half life' is at the beginning and goes on to talk about the drastic affect UV light has on the virus and then imagine what would happen to the the virus if you were to receive UV light intravenous therapy. https://www.c-span.org/vid...