When Rare Becomes Common: N2 Gene-Positive, E Gene-Negative Xpert Xpress SARS-CoV-2 PCR Results During the Delta/Omicron COVID-19 Wave and an Outlook to the New Xpert Xpress CoV-2 Plus Assay

Pitfalls in the performance of real time PCR tests for SARS CoV-2 and time to improve these tests

“…Analysis from this Italian group shows that they have similar problem as mentioned above. There are other laboratories reporting such type of pitfalls [7,8].…”