No vaccine is 100% effective, and some babies may still get RSV despite their mothers having the vaccine. However, for most babies born to vaccinated mums, any RSV infection should be less severe.
When given in pregnancy, the RSV vaccine has been found to be very effective at preventing RSV. It reduces the risk of severe bronchiolitis by 70% in the first six months of life. After this age your baby is at much lower risk of severe RSV.
It is still important to know the signs and symptoms of RSV, even if you are vaccinated.
You can find information about signs and symptoms of illnesses caused by RSV at:
NHS 111 Wales - Health A-Z : Bronchiolitis (external site)
NHS 111 Wales - Health A-Z : Pneumonia (external site)
NHS 111 Wales - Health A-Z : Ear infection (external site)
NHS 111 Wales - Health A-Z : Croup (external site)