Table 2.
Transmission to non-bubble school contacts
| Group size | Number of cases at start of study in school | Number of participants |
Number of participants testing PCR positive or number swabbed |
Participant anti-nucleoprotein total IgG |
|||||
|---|---|---|---|---|---|---|---|---|---|
| Week 1 | Week 2 | Week 3 | Week 4 | Positive on first sample | Positive on last sample | ||||
| A | 30 | 1 | 5 | 0/1 | 0/5 | 0/5 | 0/5 | 3/5 | 1/5 |
| B | 22 | 1 | 12 | 0/12 | 0/12 | 0/12 | 0/12 | 1/12 | 1/12 |
| D* | 27 | 1 | 2 | .. | 0/2 | 0/1 | 0/2 | 0/2 | 1/2 |
| E* | 30 | 1 | 10 | .. | 0/10 | 3/8 | 1/5 | 2/10 | 1/8 |
| F | 11 | 2 | 2 | 0/1 | 0/1 | 0/2 | ND | 0/2 | 0/1 |
| G† | 24 | 4 | 7 | .. | 0/7 | 0/7 | 0/7 | 1/7 | 2/7 |
| G.ad | 3 | .. | 0/3 | 0/3 | 0/3 | 0/3 | 0/3 | ||
| K | 306 | 26 | 16 | 0/14 | 0/16 | 0/16 | ND | 3/16 | 4/16 |
| M | 30 | 1 | 8 | 0/6 | 0/7 | 0/8 | ND | 3/8 | 3/7 |
| Total | 480 | 37 | 65 | 0/34 | 0/63 | 3/62 | 1/34 | 13/65 | 13/61 |
Data are n or n/N. A–M are different educational settings each of which had at least one case to which a bubble was exposed. Non-bubble school contacts all provided at least one swab. ..=not done. G.ad=adults.
*
Swabbing of school contacts started one week after initial case.
†
Four cases in school included two children and two adults. Non-bubble contacts, seven children and three adults.