The 'whoop' sound occurred as a baby drew a breath after a long coughing attack.
Babies under 1-year-old were at the most risk of serious complications from the illness such as pneumonia and brain damage.
Pregnant women could get a whooping cough booster vaccination free between 28 and 38 weeks of pregnancy.
This was the time she could pass her immunity on to the baby, helping protect them until they were old enough to be vaccinated against whooping cough themselves as part of their free childhood immunisation at 6 weeks, 3 months and 5 months old.
Mr Shoemack said as children have now gone back to school and preschool, it was a good time to check if family was up to date with immunisations.
Whooping cough - If babies catch whooping cough they may not be able to feed or breathe properly - May become so ill they need to go to hospital - Could end up with serious complications such as pneumonia or brain damage