Table 1.
Epidemiological profile of viral infection in Brazilian patients hospitalized for severe acute respiratory syndrome caused by the influenza virus.
| Marker | Groups | N (%) |
|---|---|---|
| Influenza virus | Influenza A virus | 167 (35.0%) |
| Influenza A virus H1N1 subtype | 50 (10.5%) | |
| Influenza A virus H3N2 subtype | 183 (38.4%) | |
| Influenza B virus | 76 (15.9%) | |
| Influenza B virus Victoria subtype | 1 (0.2%) | |
| Group of influenza virus | Influenza A virus | 400 (83.9%) |
| Influenza B virus | 77 (16.1%) | |
| Respiratory virus* | Adenovirus | 64 (13.4%) |
| Bocavirus | 16 (3.4%) | |
| Metapneumovirus | 18 (3.8%) | |
| Parainfluenza virus type 1 | 51 (10.7%) | |
| Parainfluenza virus type 2 | 17 (3.6%) | |
| Parainfluenza virus type 3 | 25 (5.2%) | |
| Parainfluenza virus type 4 | 7 (1.5%) | |
| Rhinovirus | 67 (14.0%) | |
| Respiratory syncytial virus | 253 (53.0%) |
%, percentage; N, number of individuals. *: 36 patients had more than two respiratory viruses - 31 (6.5%) with two additional viruses and 5 (1.0%) with three additional viruses. The data were collected in the Open-Data-SUS (https://opendatasus.saude.gov.br/). The data comprised the period from December 19, 2019, to April 06, 2023—three years since the beginning of the coronavirus disease (COVID)-19 pandemic in Brazil.