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Antigen rapid diagnostic test result in comparison to viral load.
Viral load was determined by quantitative reverse transcription polymerase chain reaction (RT-qPCR, n=99), dotted line: viral load of 106 SARS-CoV-2 RNA copies per ml. Due to limited sample volume two samples could not be retested using the reference RT-qPCR method. ****: p<0•0001 (Mann-Whitney U test)
RDT: Antigen rapid diagnostic test
Ct: Cycle threshold
