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What is the difference between SARS COV 2 NAA and SARS COV 2 RNA? 

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SARS-CoV-2 RNA was found to be significantly more persistent than infectious SARS-CoV-2, indicating that the environmental detection of RNA alone does not substantiate risk of infection.
SARS-CoV-2 virus RNA persists much longer in the gastrointestinal (GI) tract than that in respiratory tract.
In this study, we found that RNA folding stability of SARS-CoV-2 genome is exceptional among viral genomes and we developed a method to directly compare levels of predicted secondary structure across SARS-CoV-2 domains.
There was no statistically significant difference between RNA decay characteristics of SARS-CoV-2 and MHV were identified; thus, MHV is suggested as suitable persistence surrogate.
Reasons for the repeated presence of SARS-CoV-2 RNA may be contribute to the biological characteristics of SARS-CoV-2 and might also be related to coexisting diseases, low neutralizing antibody titres or resistance to antiviral drugs.
SARS-CoV-2 RNA in serum at hospital admission indicates a high-risk of progression to critical disease and death.
The SARS-CoV-2 RNA interactome provides an unprecedented molecular perspective on SARS-CoV-2 infections and enables the systematic dissection of host dependency factors and host defense strategies, a crucial prerequisite for designing novel therapeutic strategies.
Together, the results demonstrate that measuring SARS-CoV-2 RNA concentrations in settled solids may be a more sensitive approach than measuring SARS-CoV-2 in influent.
SARS‐CoV‐1 and SARS‐CoV‐2 are similar in many regards, so information can often be derived.
The correlation between SARS-CoV-2 antigen and SARS-CoV-2 culture represents a significant advancement in determining the risk for potential transmissibility beyond that which can be achieved by detection of SARS-CoV-2 genomic RNA.

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