The presence of viral RNA in respiratory samples is critical information in the diagnosis of an acute SARS-COV-2 infection. The real-time reverse transcription-polymerase chain reaction (RT-PCR) detects these pieces of RNA. But RT-PCR is a poor test of cure. The presence of RNA does not imply the presence of infectious or replication-competent virus.
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Cytogenomics is used as a general term that encompasses conventional karyotyping, as well as molecular cytogenetics (fluorescence in situ hybridization-FISH), microarrays and molecular-based techniques