A Westmeath doctor has explained why it's more effective against the virus.
The new RSV immunisation from the HSE is different from the traditional vaccine.
Nirsevimab is available freely to all newborn babies born since September this year.
RSV, a respiratory virus, is common in young babies and children, affecting half of newborns.
Doctor Deirdre Forde, GP in Kilbeggan and Athlone, says immunisation is a more direct approach: