Edit: Found it...
https://www.news-medical.net/health/What-is-Viral-Shedding.aspx
Defining viral shedding
When an individual gets infected by a respiratory virus like SARS-CoV-2, the virus particles will bind to the various types of viral receptors, particularly the angiotensin-converting enzyme 2 (ACE2) receptors in the case of SARS-CoV-2, that line the respiratory tract.
Throughout this ongoing process, infected individuals, who may not yet be experiencing any of the viral symptoms, are shedding viral particles while they talk, exhale, eat, and perform other normal daily activities.
Under normal circumstances, viral shedding will not persist for more than a few weeks; however, as researchers gain a more in-depth understanding of the viral clearance of SARS-CoV-2, they have found that certain populations will shed this virus for much longer durations.
In fact, a growing amount of evidence indicates that the viral shedding of SARS-CoV-2 begins before a patient is symptomatic, peaks at the point of or shortly after symptom onset and can continue to be released even after the individuals symptoms have been resolved.
So, since no virus cells are being introduced by the vaccine, the "shedding" scare is just another conspiracy theory brought on by someone, somewhere...
We are an insane people.