Table 3. Characteristics of SARS-CoV-2 infections among household members, detected during the school survey in Berlin, Germany, 2–16 November 2020 (n = 14).
| Index participant’s school type; household number | Positive index household member in school | Social stratuma | Ct value | Temperature (≥ 37.5 °C); self-measured | Reported present symptoms | Symptoms before test day | New symptoms after test day | Contact with a confirmed or suspected case in preceding 2 weeks | Total number of positive household members at testing (n/n tested) |
|---|---|---|---|---|---|---|---|---|---|
| Primary school; H1 | Yes | High | 19.3 | 37.9 | None (but febrile at examination) | None | 1 day after test: fever, cough, felt very ill for 14 days | Yes | 2/2 |
| Primary school; H2 | No | High | 20.4 | 36.0 | None | 5 days before test: feverish | 5 days after test: limb pain, weakness, felt very ill for 14 days | No | 1/3 |
| Primary school; H3 | No | Low | 25.9 | 37.2 | Cough | None | None | None stated | 2/4 |
| Primary school; H3 | No | Low | 25.2 | 36.7 | Sore throat | None | None | None stated | 2/4 |
| Primary school; H4 | Yes | Low | 26.1 | 36.4 | None | 3 days before test: cold symptoms | Anosmia | None stated | 2/4 |
| Primary school; H5b | No | Low | 23.5 | 36.3 | Rhinorrhoea, cough | 3 days before test: cold symptoms for 10 days | None | Yes | 1/4 |
| Primary school; H6 | Yes | Low | 11.9 | NA | None | 5 days before test: limb pain, anosmia | 2 days after test: fever, feeling very ill, after 7 days hospitalised for 5 days receiving oxygen | None stated | 4/6 |
| Primary school; H6 | Yes | Low | 21.9 | NA | None | 14 days before test: cough | None | None stated | 4/6 |
| Primary school; H6 | Yes | Low | 22.5 | NA | None | 14 days before test: mild cold | None | Yes | 4/6 |
| Secondary school; H7b | Nob | Low | 21.6 | 36.3 | Cough | 14 days before test: fever and cough for 3 days | None | Yes | 3/3 |
| Secondary school; H7b | Nob | Low | 19.4 | 36.3 | Rhinorrhoea | 10 days before test: start of cold | None | Yes | 3/3 |
| Primary school; H8b | No | Low | 21.4 | NA | Rhinorrhoea, anosmia | None | None | Yes | 2/5 |
| Primary school; H8b | No | Low | 16.9 | NA | Rhinorrhoea, cough, anosmia | Cold symptoms | None | Yes | 2/5 |
| Secondary school; H9 | No | Low | 24.8 | 35.7 | None | 14 days before: mild cold | None | No data | 1/5 |
Ct: cycle threshold; H: household; NA: not available; SARS-CoV-2: severe acute respiratory syndrome coronavirus 2.
a Strata ranking is primarily characterised by indicators of unemployment, state transfer payments and corresponding income, as well as health indicators such as premature and avoidable mortality and tobacco-related serious illnesses [16].
b In quarantine.
Age not reported to avoid identification of participants.