Taiwan's Central Epidemic Command Center (CECC) on Wednesday (Sept. 8) announced that a nurse has become its first case of a local breakthrough infection for the Moderna COVID-19 vaccine.
Chang said the woman had a cough, runny nose, and other symptoms on Aug. 26. She underwent a PCR test on Sept. 6, which resulted in a positive result for COVID-19 with a Ct value of 38. A second test taken the next day also came back positive, with a Ct value of 36.
Although the nurse's viral load was considered to be low given the high Ct value, there was still a danger of transmission given the weakened immune systems of the severely ill patients under her care. A total of 11 close contacts where she worked were identified, as well as 81 at-risk personnel, all of whom were tested for the virus.