Here is a sample.
“COVID-19 vaccine breakthrough case investigation
Information for public health, clinical, and reference laboratories.
Objective
Investigate SARS-CoV-2 infections among people who received COVID-19 vaccine to identify trends or clustering in demographic, the administered vaccine, or the infecting virus
“Respiratory specimen for SARS-CoV-2 sequencing
• Specimen selection
o Clinical specimens for sequencing should have an RT-PCR Ct value ≤28.
o If a Ct value is not available, specimens that are positive for SARS-CoV-2 RNA or antigen by another testing modality may be sent.”
They basically don't want positive results from vaccinated persons unless the RT-PCR is less than <28
Thanks. I believed it when I read it, I just couldn’t be sure or remember the exact specific details. So now I do because I read it on the internet. ;-)