| Value |
Category |
| 1 |
Grade 1/Mild |
| 2 |
Grade 2/Moderate |
| 3 |
Grade 3/Severe |
| 4 |
Grade 4/Potentially Life Threatening |
| 5 |
Grade 5/Death |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.