TABLE I. Positivity for respiratory syncytial virus from indirect immunofluorescence assays of samples of nasopharyngeal secretions collected by the SIVEP-GRIPE between 2005 and 2012 in infants less than 5 years old for the five administrative regions of Brazil.
| Region | Samples total* | Positive samples | Positivity* (%) | CI (95%) |
|---|---|---|---|---|
| North | 4139 | 386 | 9.6 | 8.7 - 10.5 |
| Northeast | 4112 | 269 | 7.1 | 6.3 - 7.9 |
| Midwest | 876 | 60 | 7.1 | 5.5 - 9.0 |
| Southeast | 2848 | 564 | 21.4 | 19.8 - 23 |
| South | 526 | 94 | 18.8 | 15.6 - 22.5 |
| Global total | 12501 | 1373 | 11.61 | 11 - 12.2 |
*Number of positive samples divided by the total number of samples (positive and negative), excluding inadequate samples and samples with inconclusive results.