| Overall (n = 237) | Outbreak A (n = 149) | Outbreak B (n = 42) | Outbreak C (n = 46) |
---|---|---|---|---|
Date of 1st blood sample | 23 Jun-16 Jul 10 | 23 Jun 10 | 9 Jul 10 | 16 Jul 10 |
Date of 2nd blood sample | 13 Jul-6 Aug 10 | 13 Jul 10 | 30 Jul 10 | 6 Aug 10 |
Date of 3rd blood sample | 21-25 Aug 10 | 21 Aug 10 | 25 Aug 10 | 25 Aug 10 |
Seroconversion during prophylaxis (second vs first samples)* | Â | Â | Â | Â |
   Total | 16/226 (7.1%) | 10/141 (7.1%) | 4/40 (10%) | 2/45 (4.4%) |
   Symptomatic | 8/226 (3.5%) | 3/141 (2.1%) | 3/40 (7.5%) | 2/45 (4.4%) |
   Asymptomatic (and RT-PCR negative) | 8/226 (3.5%) | 7/141 (5.0%) | 1/40 (2.5%) | 0/45 (0.0%) |
Overall infection rate during outbreak (serological and index cases) | 27/237 (11.4%) | 18/149 (12.1%) | 6/42 (14.3%) | 3/46 (6.5%) |
Seroconversion post-prophylaxis (third vs second samples) | Â | Â | Â | Â |
   Total | 23/190 (12.1%) | 16/115 (13.9%) | 1/34 (2.9%) | 6/41 (14.6%) |
   Symptomatic | 4/190 (2.1%) | 2/115 (1.7%) | 1/34 (2.9%) | 1/41 (2.4%) |
   Asymptomatic | 19/190 (10.0%) | 14/115 (12.2%) | 0/34 (0.0%) | 5/41 (12.2%) |