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Bronchiolitis is an illness that occurs when a virus infects the smallest airways in a baby’s lungs causing them to become swollen and inflamed. This can make it more difficult for the baby to breathe.
When a baby develops an infection in the first 72 hours of life, this is called early onset neonatal sepsis (EONS). This leaflet is for parents and guardians of newborn babies at risk of, or being treated for, suspected infection.