https://www.ted.com/talks/mary_lou_jepsen_how_we_can_use_light_to...

https://www.ted.com/talks/mary_lou_jepsen_how_we_can_use_light_to_see_deep_inside_our_bodies_and_brains/transcript?language=en

Great TED talk on how light can be used to see inside the body. It is not about photo therapies but does answer the question of light penetrating the body. Late in the talk the presenter confirms the whole body is within reach for their tech using red light, some good demonstration as well. This shows that the concept of activation of something like IVX-P02 deep in tissue or in blood for CTC’ should not be an issue.

This then boils the whole box and dice down to the critical point of does it work outside of the Petrie dish. The trials will give us all that answer.