I know there are whole websites and fbook groups dedicated to vaccine "shedding". I don't know if it's true only because the vax makes the body produce a protein and not the whole coronavirus. People that actually have or have had a viral infection can shed virus but it's usually only for a certain time.
There are a few scholarly articles that are indicating the spike protein may be making coronavirus infections easier to get and may be contributing to "long covid"; but they don't support the vax "shedding".
The covid thing had created a multi billion dollar cottage industry and people are going to find every way under the sun to monetize people's fear of it.
Here's an abstract but the author sells supplements.
(post is archived)