Comparison of RSV presentations in peak months for 2019 and 2020 and rates per age group in Western Australia (WA) Metropolitan region
| Peak month | July 2019 | December 2020 | P value | |
| Total (percentage of yearly total) | 123 (27.1) | 327 (73.5) | <0.001 | |
| WA Metropolitan region | N (% total) | 99 (80.5) | 310 (94.8) | <0.001 |
| Under 12 months | N | 54 | 115 | |
| Rate per 1000 | 2.14 | 4.56 | <0.001 | |
| 95% CI | 1.6 to 2.8 | 3.8 to 5.5 | ||
| Between 12 and 24 months | N | 17 | 104 | |
| Rate per 1000 | 0.7 | 4.1 | <0.001 | |
| 95% CI | 0.4 to 1.1 | 3.4 to 5 | ||
| Between 24 and 48 months | N | 20 | 67 | |
| Rate per 1000 | 0.4 | 1.3 | <0.001 | |
| 95% CI | 0.2 to 0.6 | 1 to 1.6 | ||
N, number; RSV, respiratory syncytial virus.