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Virus isolates and titers in paired serum samples
| ID | RNA copies per milliliter respiratory swab suspension | Spike-rIFT-229E titers in serum |
| AC04/KSA/2014 | 5.1E+08 | 1:3,200 |
| JC50/KSA/2014 | 7.2E+08 | 1:800 |
| JC49/KSA/2014 | 4.8E+06 | 1:3,200 |
| JC52/KSA/2014 | 1.8E+07 | Negative |
| HCoV-229E/BN1/GER/2015 | 4.2E+09 | 1:3,200 |
