A red shield would block as noted in basic terms, allowing only red light through If you want to block red light start at 550 Green and work to shorter wavelengths (colors). IR will need it's own separate filter to block . This is simplifying it
Healing with light wave lengths (think Rife)
https://www.webmd.com/migraines-headaches/news/20170913/new-uses-for-light-therapy
DMSO ( Dimethyl sulfoxide) is not the same as MMS (chlorine-dioxide)
Know what your doing before you get poisoned.
Be very careful, it will allow anything ANYTHING! to be absorbed through the skin into your system . Washing it off will not work once applied. People have gotten poisoned from everyday substances after using DMSO
It is a good noninflammatory agent and in some cases antibacterial /viral. Just be careful