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Volume 32, Number 1—January 2026
Research
Reduced Emergency Department Visits and Hospitalizations in Infants after Universal Respiratory Syncytial Virus Immunization, Italy, 2024–25
, Simona Scarioni1, Enrico Pigozzi, Manuel Maffeo, Mauro Maistrello, Giorgio Bagarella, Francesco Scovenna, Federica Morani, Marlen Romano, Gianvincenzo Zuccotti, Massimo Agosti, Catia Borriello, Elena Pariani, Guido Bertolaso, Luigi Vezzosi, Fausto Baldanti, Mario Melazzini, Elena Azzolini, Gabriele del Castillo2, Danilo Cereda2, and Regional Immunization Council3
Table 1
EDVs and hospitalizations for lower respiratory tract infection at seasonal peak week among children in study of reducedEDVs and hospitalizations in infants after universal respiratory syncytial virus immunization, Italy, 2024–25*
| Winter season | Children <12 mo |
Children 1–5 y |
|||
|---|---|---|---|---|---|
| EDVs | Hospital admission | EDVs | Hospital admission | ||
| 2018–19 | 221 (week 1) | 176 (week 1) | 13 (week 5) | 9 (week 50) | |
| 2019–20 | 230 (week 52) | 175 (week 1) | 33 (week 52) | 10 (week 9) | |
| 2020–21 | 10 (week 41) | 13 (week 42) | 5 (week 40) | 3 (week 41) | |
| 2021–22 | 354 (week 46) | 268 (week 46) | 37 (week 46) | 16 (week 45) | |
| 2022–23 | 358 (week 1) | 250 (week 49) | 24 (week 49) | 24 (week 52) | |
| 2023–24 | 364 (week 52) | 212 (week 52) | 35 (week 51) | 24 (week 51) | |
| 2024–25 | 123 (week 52) | 73 (week 1) | 43 (week 52) | 18 (week 6) | |
*Numbers shown are for winter seasons from 2018–19 to 2024–25. The ISO week in which the peak was reached is indicated in parentheses. EDV, emergency department visit.
1These authors contributed equally to this article and share first authorship.
2These authors contributed equally to this article and share last authorship.
3Members of the Regional Immunization Council are listed at the end of this article.