Each winter, a familiar virus quietly fills pediatric wards across Ireland, sending thousands of infants into hospital before they are old enough to understand why. Ireland's Health Service Executive, armed with last year's striking evidence — hospitalizations cut by three-quarters among vaccinated babies — is now offering a second year of free nirsevimab injections to newborns and young infants ahead of the 2025–2026 winter season. The programme is both a shield for individual children and a deliberate act of stewardship, preserving hospital capacity for the illnesses that cannot be prevented
HSE expands RSV vaccination programme for babies as winter virus season approaches
RSV causes serious illness and hospitalization in infants; before vaccination, 4 in 100 babies were hospitalized annually with some requiring intensive care.
Four out of every 100 infants ended up hospitalized each winter
Mark
Why does RSV hit babies so much harder than older children or adults?
Mimi
Their lungs are still developing, and their immune systems haven't encountered the virus before. In older kids and adults, RSV is usually just a cold. In babies, especially newborns, it can narrow those small airways and make breathing difficult enough to need hospital care.
Mark
The 76 percent drop in hospitalizations—is that because fewer babies got sick, or because vaccinated babies who did get sick had milder cases?
Mimi
Both, really. The vaccine reduces infection overall, but it also means that if a vaccinated baby does catch RSV, the illness tends to be much less severe. You're not preventing every case, but you're preventing the serious ones.
Mark
Why is the HSE calling this a "path-finder" instead of just a permanent programme?
Mimi
They want to understand what works best before committing to it long-term. How do you reach parents most effectively? What's the best timing? Should it be in maternity hospitals, community clinics, or both? Last year answered some of those questions. This year will answer more.
Mark
If 83 percent of parents accepted the vaccine last year, what about the other 17 percent?
Mimi
That's the question nobody's fully answered yet. Some parents may not have been offered it, some may have had concerns, some may have missed the window. The HSE is trying to reach more of those families this year by extending the programme to older babies.
Mark
What happens to babies born after February 2026 if the programme ends?
Mimi
That's the real uncertainty. The HSE hasn't committed to making this permanent. They're gathering evidence to make that case, but for now, it's a winter-only programme. If it ends, those babies born in spring and summer won't have access to the vaccine unless something changes.
Le Pouls
- Before vaccination, four in every hundred Irish infants were hospitalized with RSV each winter — a quiet, recurring crisis that overwhelmed pediatric wards season after season.
- Last year's rollout shattered expectations: 83% of eligible parents accepted the jab, and hospitalizations among vaccinated babies fell by 76%, with emergency visits and ICU admissions dropping sharply alongside.
- The HSE is now expanding access — newborns will receive nirsevimab before leaving maternity hospitals, while older babies born March through August can be booked into community clinics from August 25.
- The programme is designed not only to protect this year's cohort but to serve as a 'path-finder,' generating a second year of data to shape Ireland's long-term RSV prevention strategy.
- With winter demand already straining pediatric hospitals, health officials are framing high vaccine uptake as a matter of system resilience, not just individual protection.
Each winter, a familiar virus quietly fills pediatric wards across Ireland, sending thousands of infants into hospital before they are old enough to understand why. Ireland's Health Service Executive, armed with last year's striking evidence — hospitalizations cut by three-quarters among vaccinated babies — is now offering a second year of free nirsevimab injections to newborns and young infants ahead of the 2025–2026 winter season. The programme is both a shield for individual children and a deliberate act of stewardship, preserving hospital capacity for the illnesses that cannot be prevented. In choosing to vaccinate, parents participate in something larger than their own child's safety: a collective effort to make winter less dangerous for the most vulnerable.
As Irish winters reliably bring cold air and crowded hospital corridors, the HSE is entering its second year of offering free RSV vaccinations to infants — a programme that last year proved more effective than many had dared hope.
RSV is a common respiratory virus that, in babies, can rapidly escalate into bronchiolitis or pneumonia. Before vaccination, the toll was significant: half of all infants caught the virus each winter, four in a hundred were hospitalized, and a small number required intensive care. The virus was a predictable seasonal emergency, year after year.
Last winter, nearly 22,500 babies received nirsevimab, with 83% of eligible parents accepting the offer. The results were striking — hospitalizations fell by 76%, emergency department visits by 57%, and both overall cases and ICU admissions dropped by 65%. Thousands of families were spared the fear and disruption of a winter hospitalization.
This year, the programme is broader. Babies born between September 2025 and February 2026 will be vaccinated before leaving maternity hospitals. Older infants — those born between March and August — can now be booked into community clinics, with online appointments opening August 25 and slots available from September through early October.
HSE National Director Dr Éamon O'Moore has framed the scheme as protection for both individual babies and the health system itself. Pediatric hospitals are at their most stretched in winter; reducing preventable RSV admissions keeps capacity available for children who need it most.
Beyond this season, the rollout serves as a 'path-finder' — a second year of evidence to guide how Ireland approaches RSV prevention in the years ahead. The data so far suggests a clear pattern: when parents understand the risk and access is straightforward, they choose to protect their children.
As the weather turns cold, Irish parents will soon face a familiar choice: protect their babies against a virus that sends thousands to hospital each winter, or hope their child avoids it. The Health Service Executive is rolling out its second year of free vaccinations against Respiratory Syncytial Virus, a common respiratory infection that can turn serious fast in infants and young children.
RSV spreads through the air when someone coughs or sneezes, or through close contact with an infected person. In babies, it can trigger pneumonia or bronchiolitis—inflammation of the small airways in the lungs. Before the vaccine programme began, the numbers were stark: four out of every 100 infants ended up hospitalized with RSV each winter. Another fifty out of every 100 caught the virus at all, many needing care from their GP or a children's hospital emergency department. For a small number of babies, particularly those at higher risk, RSV infection could mean intensive care or death.
Last winter changed the picture. Nearly 22,500 babies received the jab, with 83 percent of eligible parents accepting the offer. The results were dramatic. Hospitalizations fell by 76 percent. Emergency department visits dropped 57 percent. Overall cases declined by 65 percent. Intensive care admissions fell by the same proportion. Those numbers represent thousands of babies spared serious illness and thousands of parents spared the fear and disruption of a winter hospitalization.
This year, the HSE is expanding the programme. All babies born between September 1, 2025 and February 28, 2026 will be offered the vaccine—called nirsevimab—before they leave the maternity hospital. The scheme is also being extended to older babies: those born from March 1 to August 31 can now book appointments at community clinics. Parents of those older infants can reserve slots online starting August 25, with appointments available from September 1 through early October.
The injection itself is simple: a quick shot into the baby's leg, free of charge, designed to protect through the entire winter season. Dr Éamon O'Moore, the HSE's National Director for Health Protection, framed the programme not just as protection for individual babies but as a way to preserve the health system itself. Winter is the busiest season in pediatric hospitals. RSV admissions pile up alongside flu and other seasonal illnesses. By vaccinating babies now, the HSE reduces preventable admissions and keeps hospital capacity available for children who truly need intensive intervention.
O'Moore emphasized the scale of the problem before vaccination existed. "Each winter, RSV infection causes hospitalisations, including some serious illness," he said, urging all eligible parents to take up the offer when the programme begins in September. The vaccine is strongly recommended by both HSE experts and the National Immunisation Advisory Committee.
This year's rollout serves a dual purpose. It will protect another cohort of babies from a genuinely dangerous virus. But it will also function as what the HSE calls a "path-finder"—a second year of data collection and analysis to understand how best to implement RSV prevention going forward. The programme runs through the end of February 2026, when winter naturally winds down and RSV cases drop. What happens after that remains an open question, but the evidence from last year suggests that when parents understand the risk and have access to protection, they choose to use it.
Citations marquantes
Before the introduction of the programme, each winter, 4 out of every 100 infants were hospitalised due to RSV, with some infants needing special treatment in intensive care units.— Dr Éamon O'Moore, HSE National Director for Health Protection
The RSV immunisation programme will help safeguard vital hospital paediatric services during the very busy winter months by limiting preventable admissions caused by RSV related illness.— Dr Éamon O'Moore
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