Table 1 Proportion of participants with documented vaccination status (vaccination record or family physician) according to reported vaccination status and study group
pH1N1 vaccinated | pH1N1 unvaccinated | Seasonal influenza 09/10 vaccinated | Seasonal influenza 09/10 unvaccinated | |
|---|---|---|---|---|
Proportion with documented vaccination status* (%) | ||||
pH1N1 positive ARI cases (N = 24) | 0/0 | 7/24 (29%) | 6/6 (100%) | 5/18 (28%) |
Hospital controls matched to pH1N1 positive cases (N = 40) | 6/6 (100%) | 12/34 (35%) | 7/9 (78%) | 10/39 (33%) |
pH1N1 negative ARI cases (test negative controls, N = 119) | 6/7 (86%) | 30/110 (27%) | 31/36 (86%) | 19/81 (23%) |
HIV patients | 9/10 (90%) | 11/12 (92%) | 13/14 (93%) | 7/7 (100%) |