Table 1.
Clinical characteristics of population, results of RT-PCR on nasopharyngeal swab specimen and rapid diagnostic tests.
| Resident number, sex, age (years) | Kinship | Symptoms | Date of onset of symptoms | RT-PCR results | Ct positivity (for RdRP, N and E genes) | COVID-19 IgM | COVID-19 IgG | Smoking status |
|---|---|---|---|---|---|---|---|---|
| House A (one family) | ||||||||
| 1. Male, 672. Female, 653. Male, 344. Female, 335. Male, 336. Female, 337. Female, 28. Male, 35 | Husband case 2Wife case 1Husband case 4Wife case 3Husband case 6Wife case 5Daughter case 5Son case 1 and 2 | YesMildYesNoNoNoNoNoNo | March 13March 16March 20NANANANANA | PositiveNegativePositiveNegativeNegativeNDNDND | 20, 17, 1622,19,18 | PositiveNegativePositiveNegativeNegativeNegativeNegativeNegative | PositiveNegativeNegativeNegativeNegativePositiveNegativeNegative | NoNoYesNoYesYesNoYes |
| House B (two families) | ||||||||
| 9. Male, 3710. Female, 3711. Male, 612. Male, 413. Male, 214. Male, 4915. Female, 3516. Female, 617. Female, 4 | Husband case 10Wife case 9Son case 9 and 10Son case 9 and 10Son case 9 and 10Husband case 15Wife case 14Daughter case 14/15Daughter case 14/15 | YesNoNoNoMildNoNoNoNo | March 12NANANANANANANANA | NDNDNDNDNDNDNDNDND | NegativeNegativeNegativeNegativeNegativeNegativeNegativeNegativeNegative | PositiveNegativeNegativeNegativeNegativeNegativeNegativeNegativeNegative | YesYesNoNoNoYesYesNoNo | |
| House C (one family) | ||||||||
| 18. Male, 8419. Female, 7520. Male, 4821. Male, 2722. Female, 3723. Male, 3824. Male, 725. Male, 326. Male, 4727. Female, 4628. Male, 1629. Male, 1430. Male, 8 | Husband case 19Wife case 18Son case 18–19,Husband case 20Daughter case 19/20Husband case 22Son case 22/23Son case 22/23Husband case 27Wife case 26Son case 26/27Son case 26/27Son case 26/27 | Yes, severeYesYesNoYesMildNoNoNoNoNoNoNo | March 21March 24March 24NAMarch 10March 14NANANANANANANA | PositiveNDNDNDNDNDNDNDNDNDNDNDND | 27, 28, 26 | PositiveNegativeNegativeNegativeNegativeNegativeNegativeNegativeNegativeNegativeNegativeNegativeNegative | PositivePositivePositiveNegativePositivePositiveNegativeNegativeNegativeNegativeNegativeNegativeNegative | NoNoNoNoYesYesNoNoYesNoNoNoNo |
Abbreviations: Ct = cycle threshold; NA = not applicable; ND = not done.