The CDC limits CT to 28 for vaccinated samples when counting breakthrough cases. > For cases with a known RT-PCR cycle threshold (Ct) value, submit only specim

The CDC limits CT to 28 for vaccinated samples when counting breakthrough cases. > For cases with a known RT-PCR cycle threshold (Ct) value, submit only specimens with Ct value ≤28 to CDC for sequencing. (Sequencing is not feasible with higher Ct values.) https://www.cdc.gov/vaccines/covid-19/health-departments/breakthrough-cases.html https://www.cdc.gov/vaccines/covid-19/health-departments/bre...